CVE-2023-40343
Jenkins Tuleap Authentication Plugin non-constant time token comparison
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2023-40343- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-203
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2023-40343- Updated
- 2026-11-02
EUVDEUVD-2023-2218
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.
- Record
EUVD-2023-2218- CVSS
- 0.0 None
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5r33-mgjf-6656
Jenkins Tuleap Authentication Plugin non-constant time token comparison
Jenkins Tuleap Authentication Plugin 1.1.20 and earlier does not use a constant-time comparison when checking whether two authentication tokens are equal.
This could potentially allow attackers to use statistical methods to obtain a valid authentication token.
Tuleap Authentication Plugin 1.1.21 uses a constant-time comparison when validating authentication tokens.
- Record
GHSA-5r33-mgjf-6656- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-203
- Updated
- 2026-11-02
OSVGHSA-5r33-mgjf-6656
Jenkins Tuleap Authentication Plugin non-constant time token comparison
Jenkins Tuleap Authentication Plugin 1.1.20 and earlier does not use a constant-time comparison when checking whether two authentication tokens are equal.
This could potentially allow attackers to use statistical methods to obtain a valid authentication token.
Tuleap Authentication Plugin 1.1.21 uses a constant-time comparison when validating authentication tokens.
- Record
GHSA-5r33-mgjf-6656- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-203
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
io.jenkins.plugins:tuleap-oauthMaven |
before 1.1.21 | 1.1.21 |
io.jenkins.plugins:tuleap-oauthMaven |
before 1.1.21, plus listed versions 1.0.01.1.01.1.11.1.101.1.11 Show 15 moreShow less1.1.121.1.131.1.141.1.151.1.161.1.171.1.181.1.191.1.201.1.31.1.41.1.51.1.61.1.71.1.9 |
1.1.21 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-40343 is a medium vulnerability (CVSS 5.9) in Jenkins Tuleap Authentication, published August 16, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.59%, the 48th percentile. Fixed in io.jenkins.plugins:tuleap-oauth 1.1.21.