CVE-2023-1836

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-03 · updated 2026-06-17
Weakness: CWE-79

Description

A cross-site scripting issue has been discovered in GitLab affecting all versions starting from 5.1 before 15.9.6, all versions starting from 15.10 before 15.10.5, all versions starting from 15.11 before 15.11.1. When viewing an XML file in a repository in "raw" mode, it can be made to render as HTML if viewed under specific circumstances

Affected products

GitLab: from 5.1 before 15.9.6; from 15.10 before 15.10.5; from 15.11 before 15.11.1 — fixed in 15.10.5, 15.11.1, 15.9.6

How to fix

Upgrade to a fixed version: GitLab 15.10.5, 15.11.1, 15.9.6. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-1836.json
https://gitlab.com/gitlab-org/gitlab/-/issues/404613
https://hackerone.com/reports/1923293
https://gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-1836.json
https://gitlab.com/gitlab-org/gitlab/-/issues/404613
https://hackerone.com/reports/1923293

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