CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-21865

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can convert some personal messages to public topics when they shouldn't have access. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. As a workaround, site admin can temporarily revoke the moderation role from untrusted moderators or remove the moderator group from the "personal message enabled groups" site setting until the Discourse instance has been upgraded to a version that has been patched.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.0

EPSS Ranking 6.6%

CVSS Severity

CVSS v3 Score 6.5

References

https://github.com/discourse/discourse/security/advisories/GHSA-4777-wrv5-3g39

Products affected by CVE-2026-21865

Discourse » Discourse » Version: Any

cpe:2.3:a:discourse:discourse:*
Discourse » Discourse » Version: N/A

cpe:2.3:a:discourse:discourse:-
Discourse » Discourse » Version: 0.8.0

cpe:2.3:a:discourse:discourse:0.8.0
Discourse » Discourse » Version: 0.8.1

cpe:2.3:a:discourse:discourse:0.8.1
Discourse » Discourse » Version: 0.8.2

cpe:2.3:a:discourse:discourse:0.8.2
Discourse » Discourse » Version: 0.8.3

cpe:2.3:a:discourse:discourse:0.8.3
Discourse » Discourse » Version: 0.8.4

cpe:2.3:a:discourse:discourse:0.8.4
Discourse » Discourse » Version: 0.8.5

cpe:2.3:a:discourse:discourse:0.8.5
Discourse » Discourse » Version: 0.8.6

cpe:2.3:a:discourse:discourse:0.8.6
Discourse » Discourse » Version: 0.8.7

cpe:2.3:a:discourse:discourse:0.8.7
Discourse » Discourse » Version: 0.8.8

cpe:2.3:a:discourse:discourse:0.8.8
Discourse » Discourse » Version: 0.8.9

cpe:2.3:a:discourse:discourse:0.8.9
Discourse » Discourse » Version: 0.9.0

cpe:2.3:a:discourse:discourse:0.9.0
Discourse » Discourse » Version: 0.9.1

cpe:2.3:a:discourse:discourse:0.9.1
Discourse » Discourse » Version: 0.9.2

cpe:2.3:a:discourse:discourse:0.9.2
Discourse » Discourse » Version: 0.9.2.5

cpe:2.3:a:discourse:discourse:0.9.2.5
Discourse » Discourse » Version: 0.9.2.6

cpe:2.3:a:discourse:discourse:0.9.2.6
Discourse » Discourse » Version: 0.9.3

cpe:2.3:a:discourse:discourse:0.9.3
Discourse » Discourse » Version: 0.9.3.5

cpe:2.3:a:discourse:discourse:0.9.3.5
Discourse » Discourse » Version: 0.9.4

cpe:2.3:a:discourse:discourse:0.9.4
Discourse » Discourse » Version: 0.9.5

cpe:2.3:a:discourse:discourse:0.9.5
Discourse » Discourse » Version: 0.9.5.1

cpe:2.3:a:discourse:discourse:0.9.5.1
Discourse » Discourse » Version: 0.9.5.2

cpe:2.3:a:discourse:discourse:0.9.5.2
Discourse » Discourse » Version: 0.9.6

cpe:2.3:a:discourse:discourse:0.9.6
Discourse » Discourse » Version: 0.9.6.1

cpe:2.3:a:discourse:discourse:0.9.6.1
Discourse » Discourse » Version: 0.9.6.2

cpe:2.3:a:discourse:discourse:0.9.6.2
Discourse » Discourse » Version: 0.9.6.3

cpe:2.3:a:discourse:discourse:0.9.6.3
Discourse » Discourse » Version: 0.9.6.4

cpe:2.3:a:discourse:discourse:0.9.6.4
Discourse » Discourse » Version: 0.9.7

cpe:2.3:a:discourse:discourse:0.9.7
Discourse » Discourse » Version: 0.9.7.1

cpe:2.3:a:discourse:discourse:0.9.7.1
Discourse » Discourse » Version: 0.9.7.2

cpe:2.3:a:discourse:discourse:0.9.7.2
Discourse » Discourse » Version: 0.9.7.3

cpe:2.3:a:discourse:discourse:0.9.7.3
Discourse » Discourse » Version: 0.9.7.4

cpe:2.3:a:discourse:discourse:0.9.7.4
Discourse » Discourse » Version: 0.9.7.5

cpe:2.3:a:discourse:discourse:0.9.7.5
Discourse » Discourse » Version: 0.9.7.6

cpe:2.3:a:discourse:discourse:0.9.7.6
Discourse » Discourse » Version: 0.9.7.7

cpe:2.3:a:discourse:discourse:0.9.7.7
Discourse » Discourse » Version: 0.9.7.8

cpe:2.3:a:discourse:discourse:0.9.7.8
Discourse » Discourse » Version: 0.9.7.9

cpe:2.3:a:discourse:discourse:0.9.7.9
Discourse » Discourse » Version: 0.9.8

cpe:2.3:a:discourse:discourse:0.9.8
Discourse » Discourse » Version: 0.9.8.1

cpe:2.3:a:discourse:discourse:0.9.8.1
Discourse » Discourse » Version: 0.9.8.10

cpe:2.3:a:discourse:discourse:0.9.8.10
Discourse » Discourse » Version: 0.9.8.11

cpe:2.3:a:discourse:discourse:0.9.8.11
Discourse » Discourse » Version: 0.9.8.2

cpe:2.3:a:discourse:discourse:0.9.8.2
Discourse » Discourse » Version: 0.9.8.3

cpe:2.3:a:discourse:discourse:0.9.8.3
Discourse » Discourse » Version: 0.9.8.4

cpe:2.3:a:discourse:discourse:0.9.8.4
Discourse » Discourse » Version: 0.9.8.5

cpe:2.3:a:discourse:discourse:0.9.8.5
Discourse » Discourse » Version: 0.9.8.6

cpe:2.3:a:discourse:discourse:0.9.8.6
Discourse » Discourse » Version: 0.9.8.7

cpe:2.3:a:discourse:discourse:0.9.8.7
Discourse » Discourse » Version: 0.9.8.8

cpe:2.3:a:discourse:discourse:0.9.8.8
Discourse » Discourse » Version: 0.9.8.9

cpe:2.3:a:discourse:discourse:0.9.8.9
Discourse » Discourse » Version: 0.9.9

cpe:2.3:a:discourse:discourse:0.9.9
Discourse » Discourse » Version: 0.9.9.1

cpe:2.3:a:discourse:discourse:0.9.9.1
Discourse » Discourse » Version: 0.9.9.10

cpe:2.3:a:discourse:discourse:0.9.9.10
Discourse » Discourse » Version: 0.9.9.11

cpe:2.3:a:discourse:discourse:0.9.9.11
Discourse » Discourse » Version: 0.9.9.12

cpe:2.3:a:discourse:discourse:0.9.9.12
Discourse » Discourse » Version: 0.9.9.13

cpe:2.3:a:discourse:discourse:0.9.9.13
Discourse » Discourse » Version: 0.9.9.14

cpe:2.3:a:discourse:discourse:0.9.9.14
Discourse » Discourse » Version: 0.9.9.15

cpe:2.3:a:discourse:discourse:0.9.9.15
Discourse » Discourse » Version: 0.9.9.16

cpe:2.3:a:discourse:discourse:0.9.9.16
Discourse » Discourse » Version: 0.9.9.17

cpe:2.3:a:discourse:discourse:0.9.9.17
Discourse » Discourse » Version: 0.9.9.18

cpe:2.3:a:discourse:discourse:0.9.9.18
Discourse » Discourse » Version: 0.9.9.2

cpe:2.3:a:discourse:discourse:0.9.9.2
Discourse » Discourse » Version: 0.9.9.3

cpe:2.3:a:discourse:discourse:0.9.9.3
Discourse » Discourse » Version: 0.9.9.4

cpe:2.3:a:discourse:discourse:0.9.9.4
Discourse » Discourse » Version: 0.9.9.5

cpe:2.3:a:discourse:discourse:0.9.9.5
Discourse » Discourse » Version: 0.9.9.6

cpe:2.3:a:discourse:discourse:0.9.9.6
Discourse » Discourse » Version: 0.9.9.7

cpe:2.3:a:discourse:discourse:0.9.9.7
Discourse » Discourse » Version: 0.9.9.8

cpe:2.3:a:discourse:discourse:0.9.9.8
Discourse » Discourse » Version: 0.9.9.9

cpe:2.3:a:discourse:discourse:0.9.9.9
Discourse » Discourse » Version: 1.0.0

cpe:2.3:a:discourse:discourse:1.0.0
Discourse » Discourse » Version: 1.0.1

cpe:2.3:a:discourse:discourse:1.0.1
Discourse » Discourse » Version: 1.0.2

cpe:2.3:a:discourse:discourse:1.0.2
Discourse » Discourse » Version: 1.0.3

cpe:2.3:a:discourse:discourse:1.0.3
Discourse » Discourse » Version: 1.0.4

cpe:2.3:a:discourse:discourse:1.0.4
Discourse » Discourse » Version: 1.1.0

cpe:2.3:a:discourse:discourse:1.1.0
Discourse » Discourse » Version: 1.1.1

cpe:2.3:a:discourse:discourse:1.1.1
Discourse » Discourse » Version: 1.1.2

cpe:2.3:a:discourse:discourse:1.1.2
Discourse » Discourse » Version: 1.1.3

cpe:2.3:a:discourse:discourse:1.1.3
Discourse » Discourse » Version: 1.2.0

cpe:2.3:a:discourse:discourse:1.2.0
Discourse » Discourse » Version: 1.2.1

cpe:2.3:a:discourse:discourse:1.2.1
Discourse » Discourse » Version: 1.2.2

cpe:2.3:a:discourse:discourse:1.2.2
Discourse » Discourse » Version: 1.2.3

cpe:2.3:a:discourse:discourse:1.2.3
Discourse » Discourse » Version: 1.2.4

cpe:2.3:a:discourse:discourse:1.2.4
Discourse » Discourse » Version: 1.3.0

cpe:2.3:a:discourse:discourse:1.3.0
Discourse » Discourse » Version: 1.3.1

cpe:2.3:a:discourse:discourse:1.3.1
Discourse » Discourse » Version: 1.3.2

cpe:2.3:a:discourse:discourse:1.3.2
Discourse » Discourse » Version: 1.3.3

cpe:2.3:a:discourse:discourse:1.3.3
Discourse » Discourse » Version: 1.3.4

cpe:2.3:a:discourse:discourse:1.3.4
Discourse » Discourse » Version: 1.3.5

cpe:2.3:a:discourse:discourse:1.3.5
Discourse » Discourse » Version: 1.4.0

cpe:2.3:a:discourse:discourse:1.4.0
Discourse » Discourse » Version: 1.4.1

cpe:2.3:a:discourse:discourse:1.4.1
Discourse » Discourse » Version: 1.4.2

cpe:2.3:a:discourse:discourse:1.4.2
Discourse » Discourse » Version: 1.4.3

cpe:2.3:a:discourse:discourse:1.4.3
Discourse » Discourse » Version: 1.4.4

cpe:2.3:a:discourse:discourse:1.4.4
Discourse » Discourse » Version: 1.4.5

cpe:2.3:a:discourse:discourse:1.4.5
Discourse » Discourse » Version: 1.4.6

cpe:2.3:a:discourse:discourse:1.4.6
Discourse » Discourse » Version: 1.4.7

cpe:2.3:a:discourse:discourse:1.4.7
Discourse » Discourse » Version: 1.5.0

cpe:2.3:a:discourse:discourse:1.5.0
Discourse » Discourse » Version: 1.5.1

cpe:2.3:a:discourse:discourse:1.5.1
Discourse » Discourse » Version: 1.5.2

cpe:2.3:a:discourse:discourse:1.5.2
Discourse » Discourse » Version: 1.5.3

cpe:2.3:a:discourse:discourse:1.5.3
Discourse » Discourse » Version: 1.5.4

cpe:2.3:a:discourse:discourse:1.5.4
Discourse » Discourse » Version: 1.6.0

cpe:2.3:a:discourse:discourse:1.6.0
Discourse » Discourse » Version: 1.6.1

cpe:2.3:a:discourse:discourse:1.6.1
Discourse » Discourse » Version: 1.6.10

cpe:2.3:a:discourse:discourse:1.6.10
Discourse » Discourse » Version: 1.6.2

cpe:2.3:a:discourse:discourse:1.6.2
Discourse » Discourse » Version: 1.6.3

cpe:2.3:a:discourse:discourse:1.6.3
Discourse » Discourse » Version: 1.6.4

cpe:2.3:a:discourse:discourse:1.6.4
Discourse » Discourse » Version: 1.6.5

cpe:2.3:a:discourse:discourse:1.6.5
Discourse » Discourse » Version: 1.6.6

cpe:2.3:a:discourse:discourse:1.6.6
Discourse » Discourse » Version: 1.6.7

cpe:2.3:a:discourse:discourse:1.6.7
Discourse » Discourse » Version: 1.6.8

cpe:2.3:a:discourse:discourse:1.6.8
Discourse » Discourse » Version: 1.6.9

cpe:2.3:a:discourse:discourse:1.6.9
Discourse » Discourse » Version: 1.7.0

cpe:2.3:a:discourse:discourse:1.7.0
Discourse » Discourse » Version: 1.7.1

cpe:2.3:a:discourse:discourse:1.7.1
Discourse » Discourse » Version: 1.7.10

cpe:2.3:a:discourse:discourse:1.7.10
Discourse » Discourse » Version: 1.7.2

cpe:2.3:a:discourse:discourse:1.7.2
Discourse » Discourse » Version: 1.7.3

cpe:2.3:a:discourse:discourse:1.7.3
Discourse » Discourse » Version: 1.7.4

cpe:2.3:a:discourse:discourse:1.7.4
Discourse » Discourse » Version: 1.7.5

cpe:2.3:a:discourse:discourse:1.7.5
Discourse » Discourse » Version: 1.7.6

cpe:2.3:a:discourse:discourse:1.7.6
Discourse » Discourse » Version: 1.7.7

cpe:2.3:a:discourse:discourse:1.7.7
Discourse » Discourse » Version: 1.7.8

cpe:2.3:a:discourse:discourse:1.7.8
Discourse » Discourse » Version: 1.7.9

cpe:2.3:a:discourse:discourse:1.7.9
Discourse » Discourse » Version: 1.8.0

cpe:2.3:a:discourse:discourse:1.8.0
Discourse » Discourse » Version: 1.8.1

cpe:2.3:a:discourse:discourse:1.8.1
Discourse » Discourse » Version: 1.8.10

cpe:2.3:a:discourse:discourse:1.8.10
Discourse » Discourse » Version: 1.8.11

cpe:2.3:a:discourse:discourse:1.8.11
Discourse » Discourse » Version: 1.8.2

cpe:2.3:a:discourse:discourse:1.8.2
Discourse » Discourse » Version: 1.8.3

cpe:2.3:a:discourse:discourse:1.8.3
Discourse » Discourse » Version: 1.8.4

cpe:2.3:a:discourse:discourse:1.8.4
Discourse » Discourse » Version: 1.8.5

cpe:2.3:a:discourse:discourse:1.8.5
Discourse » Discourse » Version: 1.8.6

cpe:2.3:a:discourse:discourse:1.8.6
Discourse » Discourse » Version: 1.8.7

cpe:2.3:a:discourse:discourse:1.8.7
Discourse » Discourse » Version: 1.8.8

cpe:2.3:a:discourse:discourse:1.8.8
Discourse » Discourse » Version: 1.8.9

cpe:2.3:a:discourse:discourse:1.8.9
Discourse » Discourse » Version: 1.9.0

cpe:2.3:a:discourse:discourse:1.9.0
Discourse » Discourse » Version: 1.9.1

cpe:2.3:a:discourse:discourse:1.9.1
Discourse » Discourse » Version: 1.9.2

cpe:2.3:a:discourse:discourse:1.9.2
Discourse » Discourse » Version: 1.9.3

cpe:2.3:a:discourse:discourse:1.9.3
Discourse » Discourse » Version: 1.9.4

cpe:2.3:a:discourse:discourse:1.9.4
Discourse » Discourse » Version: 1.9.5

cpe:2.3:a:discourse:discourse:1.9.5
Discourse » Discourse » Version: 1.9.6

cpe:2.3:a:discourse:discourse:1.9.6
Discourse » Discourse » Version: 1.9.7

cpe:2.3:a:discourse:discourse:1.9.7
Discourse » Discourse » Version: 2.0.0

cpe:2.3:a:discourse:discourse:2.0.0
Discourse » Discourse » Version: 2.0.1

cpe:2.3:a:discourse:discourse:2.0.1
Discourse » Discourse » Version: 2.0.2

cpe:2.3:a:discourse:discourse:2.0.2
Discourse » Discourse » Version: 2.0.3

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Discourse » Discourse » Version: 2.0.4

cpe:2.3:a:discourse:discourse:2.0.4
Discourse » Discourse » Version: 2.0.5

cpe:2.3:a:discourse:discourse:2.0.5
Discourse » Discourse » Version: 2.1.0

cpe:2.3:a:discourse:discourse:2.1.0
Discourse » Discourse » Version: 2.1.1

cpe:2.3:a:discourse:discourse:2.1.1
Discourse » Discourse » Version: 2.1.2

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Discourse » Discourse » Version: 2.1.3

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Discourse » Discourse » Version: 2.1.4

cpe:2.3:a:discourse:discourse:2.1.4
Discourse » Discourse » Version: 2.1.5

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Discourse » Discourse » Version: 2.1.6

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Discourse » Discourse » Version: 2.1.7

cpe:2.3:a:discourse:discourse:2.1.7
Discourse » Discourse » Version: 2.1.8

cpe:2.3:a:discourse:discourse:2.1.8
Discourse » Discourse » Version: 2.2.0

cpe:2.3:a:discourse:discourse:2.2.0
Discourse » Discourse » Version: 2.2.1

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Discourse » Discourse » Version: 2.2.10

cpe:2.3:a:discourse:discourse:2.2.10
Discourse » Discourse » Version: 2.2.11

cpe:2.3:a:discourse:discourse:2.2.11
Discourse » Discourse » Version: 2.2.15

cpe:2.3:a:discourse:discourse:2.2.15
Discourse » Discourse » Version: 2.2.2

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Discourse » Discourse » Version: 2.2.3

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Discourse » Discourse » Version: 2.2.4

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Discourse » Discourse » Version: 2.2.5

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Discourse » Discourse » Version: 2.2.6

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Discourse » Discourse » Version: 2.2.7

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Discourse » Discourse » Version: 2.2.8

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Discourse » Discourse » Version: 2.3.0

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Discourse » Discourse » Version: 2.3.1

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Discourse » Discourse » Version: 2.3.10

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Discourse » Discourse » Version: 2.3.2

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Discourse » Discourse » Version: 2.3.3

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Discourse » Discourse » Version: 2.3.4

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Discourse » Discourse » Version: 2.3.5

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Discourse » Discourse » Version: 2.3.6

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Discourse » Discourse » Version: 2.3.7

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Discourse » Discourse » Version: 2.3.8

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Discourse » Discourse » Version: 2.3.9

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Discourse » Discourse » Version: 2.4.0

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Discourse » Discourse » Version: 2.4.1

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Discourse » Discourse » Version: 2.4.2

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Discourse » Discourse » Version: 2.4.3

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Discourse » Discourse » Version: 2.4.4

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Discourse » Discourse » Version: 2.4.5

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Discourse » Discourse » Version: 2.5.0

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Discourse » Discourse » Version: 2.5.1

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Discourse » Discourse » Version: 2.5.2

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Discourse » Discourse » Version: 2.5.3

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Discourse » Discourse » Version: 2.5.4

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Discourse » Discourse » Version: 2.5.5

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Discourse » Discourse » Version: 2.5.6

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Discourse » Discourse » Version: 2.6.0

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Discourse » Discourse » Version: 2.6.1

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Discourse » Discourse » Version: 2.6.2

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Discourse » Discourse » Version: 2.6.3

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Discourse » Discourse » Version: 2.6.4

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Discourse » Discourse » Version: 2.6.5

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Discourse » Discourse » Version: 2.6.6

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Discourse » Discourse » Version: 2.6.7

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Discourse » Discourse » Version: 2.7.0

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Discourse » Discourse » Version: 2.7.1

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Discourse » Discourse » Version: 2.7.10

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Discourse » Discourse » Version: 2.7.11

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Discourse » Discourse » Version: 2.7.12

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Discourse » Discourse » Version: 2.7.13

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Discourse » Discourse » Version: 2.7.2

cpe:2.3:a:discourse:discourse:2.7.2
Discourse » Discourse » Version: 2.7.3

cpe:2.3:a:discourse:discourse:2.7.3
Discourse » Discourse » Version: 2.7.4

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Discourse » Discourse » Version: 2.7.5

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Discourse » Discourse » Version: 2.7.6

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Discourse » Discourse » Version: 2.7.7

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Discourse » Discourse » Version: 2.7.8

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Discourse » Discourse » Version: 2.7.9

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Discourse » Discourse » Version: 2.8.0

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Discourse » Discourse » Version: 2.8.1

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Discourse » Discourse » Version: 2.8.10

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Discourse » Discourse » Version: 2.8.11

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Discourse » Discourse » Version: 2.8.12

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Discourse » Discourse » Version: 2.8.13

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Discourse » Discourse » Version: 2.8.14

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Discourse » Discourse » Version: 2.8.2

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Discourse » Discourse » Version: 2.8.3

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Discourse » Discourse » Version: 2.8.4

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Discourse » Discourse » Version: 2.8.5

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Discourse » Discourse » Version: 2.8.7

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Discourse » Discourse » Version: 2.8.8

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Discourse » Discourse » Version: 2025.12.0

cpe:2.3:a:discourse:discourse:2025.12.0
Discourse » Discourse » Version: 2026.1.0

cpe:2.3:a:discourse:discourse:2026.1.0
Discourse » Discourse » Version: 3.0.0

cpe:2.3:a:discourse:discourse:3.0.0
Discourse » Discourse » Version: 3.0.1

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Discourse » Discourse » Version: 3.0.2

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Discourse » Discourse » Version: 3.0.3

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Discourse » Discourse » Version: 3.0.4

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Discourse » Discourse » Version: 3.0.5

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Discourse » Discourse » Version: 3.0.6

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Discourse » Discourse » Version: 3.1.1

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Discourse » Discourse » Version: 3.1.3

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Discourse » Discourse » Version: 3.1.4

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Discourse » Discourse » Version: 3.1.5

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Discourse » Discourse » Version: 3.2.0

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Discourse » Discourse » Version: 3.2.1

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Discourse » Discourse » Version: 3.2.2

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Discourse » Discourse » Version: 3.2.3

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Discourse » Discourse » Version: 3.2.5

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Discourse » Discourse » Version: 3.3.1

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Discourse » Discourse » Version: 3.3.2

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Discourse » Discourse » Version: 3.3.3

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Discourse » Discourse » Version: 3.3.4

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Discourse » Discourse » Version: 3.4.0

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Discourse » Discourse » Version: 3.4.1

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Discourse » Discourse » Version: 3.4.2

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Discourse » Discourse » Version: 3.4.3

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Discourse » Discourse » Version: 3.4.4

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Discourse » Discourse » Version: 3.4.6

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Discourse » Discourse » Version: 3.5.0

cpe:2.3:a:discourse:discourse:3.5.0

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