CVE-2024-23903
Non-constant time webhook token comparison in Jenkins GitLab Branch Source Plugin
Jenkins GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook token.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Jenkins GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook token.
- Record
CVE-2024-23903- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-697
- Updated
- 2026-11-02
CVE List
Jenkins GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook token.
- Record
CVE-2024-23903- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-697
- Updated
- 2026-11-02
EUVDEUVD-2024-0341
Jenkins GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook token.
- Record
EUVD-2024-0341- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-f67f-2j6r-m4c9
Non-constant time webhook token comparison in Jenkins GitLab Branch Source Plugin
Jenkins GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier does not use a constant-time comparison function when checking whether the provided and expected webhook token are equal.
This could potentially allow attackers to use statistical methods to obtain a valid webhook token.
GitLab Branch Source Plugin 688.v5fa_356ee8520 uses a constant-time comparison function when validating the webhook token.
- Record
GHSA-f67f-2j6r-m4c9- 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-697
- Updated
- 2026-11-02
OSVGHSA-f67f-2j6r-m4c9
Non-constant time webhook token comparison in Jenkins GitLab Branch Source Plugin
Jenkins GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier does not use a constant-time comparison function when checking whether the provided and expected webhook token are equal.
This could potentially allow attackers to use statistical methods to obtain a valid webhook token.
GitLab Branch Source Plugin 688.v5fa_356ee8520 uses a constant-time comparison function when validating the webhook token.
- Record
GHSA-f67f-2j6r-m4c9- 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-697
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
io.jenkins.plugins:gitlab-branch-sourceMaven |
before 688.v5fa | 688.v5fa |
io.jenkins.plugins:gitlab-branch-sourceMaven |
before 688.v5fa, plus listed versions 0.0.5-alpha-20.0.7-beta0.0.8-beta1.0.01.1.0 Show 45 moreShow less1.1.1-alpha1.1.2-alpha1.2.01.2.11.2.21.3.01.4.01.4.11.4.21.4.31.4.41.4.51.4.61.5.01.5.11.5.21.5.31.5.41.5.51.5.61.5.71.5.81.5.9621.vd49608f876da_623.vcc98dc4b_0ce4625.v85cf3a_400cfe628.ve99e3d4df4b_8629.vb_cc76608e806630.v04ca_c57fa_880633.ved9984f943da_636.v55fd8144d335640.v7101b_1c0def9642.v9ed86b_b_54384643.vdc12a_4a_06434644.va_a_66886e07b_5645.v62a_b_6fce8659646.vb_9560d64b_69f647.vdee7766b_cfa_e649.v0dda_db_88b_5ee650.va_d1ce6d01959659.va_685a_51fda_db_660.vd45c0f4c0042663.v2602c3e6376d664.v877fdc293c89670.vf7df45517001 |
688.v5fa |
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-2024-23903 is a medium vulnerability (CVSS 5.3) in Jenkins Project Gitlab Branch Source Plugin, published January 24, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.50%, the 43rd percentile. Fixed in io.jenkins.plugins:gitlab-branch-source 688.v5fa.
References
jenkins.io/security/advisory/2024-01-24
openwall.com/lists/oss-security/2024/01/24/6
nvd.nist.gov/vuln/detail/CVE-2024-23903
github.com/jenkinsci/gitlab-branch-source-plugin/commit/8bfe1046cf342b99419457b9336addbbf346f89a
Left out here: 6 versions. The JSON record has them.