Read the docs
TI-2023-21172 Aliases CVE-2023-40343GHSA-5r33-mgjf-6656

Observable discrepancy in Jenkins Tuleap Authentication Plugin

Priority LOW 27CWE-203Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-203.

Summary

Jenkins Tuleap Authentication Plugin 1.1.20 and earlier uses a non-constant time comparison function when validating an authentication token allowing attackers to use statistical methods to obtain a valid authentication token.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00591 48th percentileScored 2026-11-07
Fix Fixed io.jenkins.plugins:tuleap-oauth (Maven): 1.1.21

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JenkinsJenkins Tuleap Authentication Pluginup to 1.1.20—No fix listedCNA
—io.jenkins.plugins:tuleap-oauth (Maven)before 1.1.211.1.21Patch availableGHSA-5r33-mgjf-6656
  • Jenkins Tuleap Authentication Plugin VendorJenkins Affected up to 1.1.20 Fixed in — No fix listed CNA
  • io.jenkins.plugins:tuleap-oauth (Maven) Vendor— Affected before 1.1.21 Fixed in 1.1.21 Patch available GHSA-5r33-mgjf-6656

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:jenkins:tuleap_authentication:*:*:*:*:*:jenkins:*:*up to 1.1.20VulnerableJenkins
  • cpe:2.3:a:jenkins:tuleap_authentication:*:*:*:*:*:jenkins:*:* Versions up to 1.1.20 Vulnerable ·Jenkins

Remediation

  • Fix · GHSA-5r33-mgjf-6656 io.jenkins.plugins:tuleap-oauth (Maven) Fixed in 1.1.21 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-40343
  2. 2026-10-03 Alias added: GHSA-5r33-mgjf-6656

References

Advisory 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences