CVE-2023-3500

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

State: Published
Severity: 4.8 Medium
Published: Aug 2, 2023
Updated: Nov 20, 2025
Reserved: Jul 4, 2023

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.

Scores

CVSS	Score	Vector	Source
3.1	4.8 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N	GitLab

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
GitLabGitLab	10.0 to before 16.0.8Affected 16.1 to before 16.1.3Affected 16.2 to before 16.2.2Affected

References

GitLab Issue #416902issue-trackingpermissions-required
HackerOne Bug Bounty Report #2010926technical-descriptionexploitpermissions-required

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