CVE-2021-26073
First published: Fri Apr 16 2021(Updated: )
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 between 3.0.2 - 6.5.0 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.
Credit: security@atlassian.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Atlassian Connect Express | >=3.0.2<6.6.0 | |
| npm/atlassian-connect-express | >=3.0.2<6.6.0 | 6.6.0 |
| >=3.0.2<6.6.0 |
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Reference Links
- https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a[…]ypass-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://nvd.nist.gov/vuln/detail/CVE-2021-26073
- https://security.netapp.com/advisory/ntap-20210604-0004
- https://github.com/advisories/GHSA-4v96-m8xv-x83v (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-26073?
CVE-2021-26073 is classified as a medium severity vulnerability due to broken authentication.
How do I fix CVE-2021-26073?
To fix CVE-2021-26073, upgrade Atlassian Connect Express to version 6.6.0 or later.
What impact does CVE-2021-26073 have on my application?
CVE-2021-26073 may allow unauthorized access and manipulation of Atlassian Connect apps due to broken authentication.
Which versions of Atlassian Connect Express are affected by CVE-2021-26073?
CVE-2021-26073 affects Atlassian Connect Express versions from 3.0.2 up to but not including 6.6.0.
Is CVE-2021-26073 being actively exploited?
There is currently no publicly available information indicating active exploitation of CVE-2021-26073.
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