CVE-2023-3500

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

Published Aug 2, 2023 CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Upgrade to versions 16.2.2, 16.1.3, 16.0.8 or above.

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2023-44159 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.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Weaknesses

Sources

Status
PUBLISHED
Assigner
GitLab
Published
Updated
Nov 20, 2025, 4:07 AM
Reserved
Jul 4, 2023, 9:22 AM
Status
Modified
Published
Aug 2, 2023, 1:15 AM
Modified
Jun 17, 2026, 6:14 AM
Severity
Moderate
Public date
Aug 2, 2023, 12:00 AM