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CVE-2024-23903

17
FAUCET Score

CVE-2024-23903 affects Jenkins GitLab Branch Source Plugin versions 684.vea_fa_7c1e2fe3 and earlier. This medium-severity vulnerability (CVSS 5.3) stems from a non-constant time comparison function for webhook tokens, allowing attackers to potentially deduce valid tokens through statistical analysis. The attack requires no user interaction and has low complexity, leading to a potential compromise of confidentiality. There is no evidence of active exploitation, public exploit code, or inclusion in CISA's KEV catalog, though it has garnered some community discussion and limited media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 684.vea_fa_7c1e2fe3CPE matchmatch criteria
cpe:2.3:a:jenkins:github_branch_source:*:*:*:*:*:jenkins:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
39.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 25th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

mavenpatch availablevia ghsa
Product: io.jenkins.plugins:gitlab-branch-sourceFixed in: 688.v5fa
jenkinsvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

mavenGHSA-f67f-2j6r-m4c9low

Non-constant time webhook token comparison in Jenkins GitLab Branch Source Plugin

Jan 24, 2024

References

jenkins.io / security/advisory/2024-01-24
Vendor Advisory
openwall.com / lists/oss-security/2024/01/24/6
Mailing List