CVE-2019-5467 — An input validation and output encoding issue was discovered in the GitLab CE/EE

An input validation and output encoding issue was discovered in the GitLab CE/EE wiki pages feature which could result in a persistent XSS. This vulnerability was addressed in 12.1.2, 12.0.4, and 11.11.6.

01What is this vulnerability?

An input validation and output encoding issue was discovered in the GitLab CE/EE wiki pages feature which could result in a persistent XSS. This vulnerability was addressed in 12.1.2, 12.0.4, and 11.11.6.

02Affected products

Vendor	Product	Versions
n	a / GitLab CE/EE	Affects GitLab CE/EE 11.10 and later. Fixed in 12.1.2, 12.0.4, and 11.11.6

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-09-09T17:45:19.000Z
• Last modified: 2024-08-04T19:54:53.501Z

09References

• hackerone.com — https://hackerone.com/reports/526325
• gitlab.com — https://gitlab.com/gitlab-org/gitlab-ce/issues/60143