cve.bz

CVE-2021-26073

7.7 highEPSS 0.9%

High (7.7) in atlassian connect express. EPSS 0.9% chance of exploitation in the next 30 days. Fixed in atlassian-connect-express 6.6.0.

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.

Severity

CVSS 3.1

7.7 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
EPSS
0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-10-31)
CWE
CWE-287
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-4v96-m8xv-x83vnpmatlassian-connect-express>=3.0.2 <6.6.06.6.0

References

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