High, CVSS 7.7npmAmendedPublished
Broken Authentication in Atlassian Connect Express
CVE-2021-26073 · GHSA-4v96-m8xv-x83v
- Affected
- npm atlassian-connect-express >= 3.0.2, < 6.6.0
- Fixed in
- 6.6.0· Vendor fix available
- Issue
- 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.
Recommended action: Upgrade to 6.6.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.