VULNERABILITY INTELLIGENCE

CVE-2021-26073

CVSS score7.7 HIGH
EPSS probability0.92%
CISA KEVNot currently listed
Published2021-04-16
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Description

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.

Weakness classification

  • nvd@nist.gov: CWE-287
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-287

Primary references