CVE-2023-2200: Improper Encoding or Escaping of Output in GitLab

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-07-13 · updated 2026-06-17
Weakness: CWE-116

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 7.14 before 15.11.10, all versions starting from 16.0 before 16.0.6, all versions starting from 16.1 before 16.1.1, which allows an attacker to inject HTML in an email address field.

Affected products

GitLab: from 7.14.0 before 15.11.10; from 16.0.0 before 16.0.6; from 16.1.0 before 16.1.1 — fixed in 15.11.10, 16.0.6, 16.1.1

How to fix

Upgrade to a fixed version: GitLab 15.11.10, 16.0.6, 16.1.1. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/gitlab/-/issues/408281
https://hackerone.com/reports/1935628
https://gitlab.com/gitlab-org/gitlab/-/issues/408281
https://hackerone.com/reports/1935628

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