GitLab Community Edition/Enterprise Edition up to 18.5.4/18.6.2/18.7.0 Flavored Markdown cross site scripting

Summaryinfo

A vulnerability was found in GitLab Community Edition and Enterprise Edition up to 18.5.4/18.6.2/18.7.0. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the component Flavored Markdown. Performing a manipulation results in cross site scripting. This vulnerability was named CVE-2025-9222. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in GitLab Community Edition and Enterprise Edition up to 18.5.4/18.6.2/18.7.0. This affects an unknown function of the component Flavored Markdown. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2.2 before 18.5.5, 18.6 before 18.6.3, and 18.7 before 18.7.1 that could have allowed an authenticated user to achieve stored cross-site scripting by exploiting GitLab Flavored Markdown.

The weakness was presented by yvvdwf as 562561. It is possible to read the advisory at gitlab.com. This vulnerability is uniquely identified as CVE-2025-9222 since 08/20/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 298869 (GitLab 18.2.2 < 18.5.5 / 18.6 < 18.6.3 / 18.7 < 18.7.1 (CVE-2025-9222)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.5.5, 18.6.3 or 18.7.1 eliminates this vulnerability. The upgrade is hosted for download at about.gitlab.com.

The vulnerability is also documented in the databases at Tenable (298869) and CERT Bund (WID-SEC-2026-0037). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Open Source GitLab

Productinfo

Type

• Bug Tracking Software

Vendor

• GitLab

Name

• Community Edition
• Enterprise Edition

Version

• 18.0
• 18.1
• 18.2
• 18.3
• 18.4
• 18.5
• 18.5.0
• 18.5.1
• 18.5.2
• 18.5.3
• 18.5.4
• 18.6
• 18.6.0
• 18.6.1
• 18.6.2
• 18.7.0

License

• open-source

Website

• Vendor: https://gitlab.com/

CPE 2.3info

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CPE 2.2info

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Exploitinginfo

Threat Intelligenceinfo

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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