Vulnerability Details CVE-2021-26077
Broken Authentication in Atlassian Connect Spring Boot (ACSB) in version 1.1.0 before 2.1.3 and from version 2.1.4 before 2.1.5: Atlassian Connect Spring Boot is a Java Spring Boot package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Spring Boot app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Spring Boot versions 1.1.0 before 2.1.3 and versions 2.1.4 before 2.1.5 erroneously accept context JWTs in lifecycle endpoints (such as installation) where only server-to-server JWTs should be accepted, permitting an attacker to send authenticated re-installation events to an app.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 59.1%
CVSS Severity
CVSS v3 Score 8.8
CVSS v2 Score 6.5
Products affected by CVE-2021-26077
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cpe:2.3:a:atlassian:connect_spring_boot:1.1.0
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cpe:2.3:a:atlassian:connect_spring_boot:1.2.0
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cpe:2.3:a:atlassian:connect_spring_boot:1.2.1
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cpe:2.3:a:atlassian:connect_spring_boot:1.3.0
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cpe:2.3:a:atlassian:connect_spring_boot:1.3.1
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cpe:2.3:a:atlassian:connect_spring_boot:1.3.2
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cpe:2.3:a:atlassian:connect_spring_boot:1.3.3
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cpe:2.3:a:atlassian:connect_spring_boot:1.3.4
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cpe:2.3:a:atlassian:connect_spring_boot:1.3.5
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cpe:2.3:a:atlassian:connect_spring_boot:1.3.6
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cpe:2.3:a:atlassian:connect_spring_boot:1.4.0
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cpe:2.3:a:atlassian:connect_spring_boot:1.4.2
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cpe:2.3:a:atlassian:connect_spring_boot:1.4.3
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cpe:2.3:a:atlassian:connect_spring_boot:1.5.0
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cpe:2.3:a:atlassian:connect_spring_boot:1.5.1
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cpe:2.3:a:atlassian:connect_spring_boot:2.0.0
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cpe:2.3:a:atlassian:connect_spring_boot:2.0.1
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cpe:2.3:a:atlassian:connect_spring_boot:2.0.2
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cpe:2.3:a:atlassian:connect_spring_boot:2.0.3
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cpe:2.3:a:atlassian:connect_spring_boot:2.0.4
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cpe:2.3:a:atlassian:connect_spring_boot:2.0.5
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cpe:2.3:a:atlassian:connect_spring_boot:2.0.6
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cpe:2.3:a:atlassian:connect_spring_boot:2.0.7
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cpe:2.3:a:atlassian:connect_spring_boot:2.1.0
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cpe:2.3:a:atlassian:connect_spring_boot:2.1.1
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cpe:2.3:a:atlassian:connect_spring_boot:2.1.2
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cpe:2.3:a:atlassian:connect_spring_boot:2.1.4