Vulnerability Details CVE-2021-26073
Broken Authentication in Atlassian Connect Express (ACE) from version 3.0.2 before version 6.6.0: Atlassian Connect Express is a Node.js package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Express app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Express versions from 3.0.2 before 6.6.0 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 0.003
EPSS Ranking 56.3%
CVSS Severity
CVSS v3 Score 7.7
CVSS v2 Score 4.0
References
- https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a%5B%E2%80%A6%5Dypass-of-app-qsh-verification-via-context-jwts/47072
- https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099
- https://security.netapp.com/advisory/ntap-20210604-0004/
- https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a%5B%E2%80%A6%5Dypass-of-app-qsh-verification-via-context-jwts/47072
- https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099
- https://security.netapp.com/advisory/ntap-20210604-0004/
Products affected by CVE-2021-26073
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cpe:2.3:a:atlassian:connect_express:3.0.2
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cpe:2.3:a:atlassian:connect_express:3.3.0
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cpe:2.3:a:atlassian:connect_express:3.4.0
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cpe:2.3:a:atlassian:connect_express:3.4.1
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cpe:2.3:a:atlassian:connect_express:3.4.3
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cpe:2.3:a:atlassian:connect_express:3.4.4
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cpe:2.3:a:atlassian:connect_express:3.5.0
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cpe:2.3:a:atlassian:connect_express:3.5.1
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cpe:2.3:a:atlassian:connect_express:3.5.2
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cpe:2.3:a:atlassian:connect_express:4.0.0
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cpe:2.3:a:atlassian:connect_express:4.0.1
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cpe:2.3:a:atlassian:connect_express:4.1.0
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cpe:2.3:a:atlassian:connect_express:4.2.0
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cpe:2.3:a:atlassian:connect_express:4.3.0
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cpe:2.3:a:atlassian:connect_express:4.4.0
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cpe:2.3:a:atlassian:connect_express:4.4.1
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cpe:2.3:a:atlassian:connect_express:5.0.0
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cpe:2.3:a:atlassian:connect_express:6.0.0
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cpe:2.3:a:atlassian:connect_express:6.1.0
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cpe:2.3:a:atlassian:connect_express:6.2.0
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cpe:2.3:a:atlassian:connect_express:6.2.1
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cpe:2.3:a:atlassian:connect_express:6.2.2
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cpe:2.3:a:atlassian:connect_express:6.2.3-0
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cpe:2.3:a:atlassian:connect_express:6.2.3-1
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cpe:2.3:a:atlassian:connect_express:6.3.0
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cpe:2.3:a:atlassian:connect_express:6.4.0
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cpe:2.3:a:atlassian:connect_express:6.5.0