Vulnerability · Published Aug 2, 2023 · Assigned by GitLab
CVE-2023-3500Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
Medium 4.8
In plain English
A medium-severity cross-site scripting in GitLab from GitLab. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).
Severity (CVSS 3.1)4.8Medium
Exploit odds (30 days)0.5%top 55.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.0 before 16.0.8, all versions starting from 16.1 before 16.1.3, all versions starting from 16.2 before 16.2.2. A reflected XSS was possible when creating specific PlantUML diagrams that allowed the attacker to perform arbitrary actions on behalf of victims.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
References
- GitLab Issue #416902 issue-tracking, permissions-required
- HackerOne Bug Bounty Report #2010926 technical-description, exploit, permissions-required