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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.7 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
atlassianCNA
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CVEADP
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CISA-ADPADP
7.7 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 46%
VendorProductVersion
atlassianconnect_express
3.0.2 ≤
𝑥
< 6.6.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
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/