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CVE-2018-17975: GitLab can expose project data through markdown API

CVE-2018-17975 · published 7 years ago

Summary

Versions of GitLab Community Edition before the latest patches may reveal information about projects when the markdown formatting feature is used. This could allow someone to see details that should remain private. Update GitLab to the newest release or apply the provided security patch to stop the exposure.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
gitlab	gitlab	>= 11.0.0, < 11.1.8 >= 11.2.0, < 11.2.5 >= 11.3.0, < 11.3.2 `cpe:2.3:a:gitlab:gitlab:::::community:::*`

Original advisory text

An issue was discovered in GitLab Community Edition 11.x before 11.1.8, 11.2.x before 11.2.5, and 11.3.x before 11.3.2. There is Information Exposure via the GFM markdown API.

References

https://about.gitlab.com/2018/10/05/critical-security-release-11-3-4/ Vendor Advisory
https://gitlab.com/gitlab-org/gitlab-ce/issues/50744 Exploit Issue Tracking Vendor Advisory

Fix within

Internet-facing 14 days

Internal 60 days

Not known to be exploited
Can be exploited automatically (estimated)
Gives an attacker partial control (estimated)

Severity

5.3 Medium

Exploitation

1% chance of attack within 30 days

Type

CWE-200Information Exposure

Timeline

Published4 Dec 2018

Updated4 Nov 2026

First seen29 Sep 2026

Sources

CVE-2018-17975 · NVD

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