GitLab: Authenticated User Can Inject JavaScript

Summary

An authenticated user can inject malicious JavaScript code into a GitLab project if a specific feature is enabled. This could potentially lead to unauthorized actions or data theft. To protect your instance, update to the latest version of GitLab.

What to do

Update gitlab to version 18.9.2.

Affected software

Vendor	Product	Affected versions	Fix available
–	gitlab	> 18.9.0 , <= 18.9.2	18.9.2
gitlab	gitlab	> 10.6.0 , <= 18.7.6	–
gitlab	gitlab	> 10.6.0 , <= 18.7.6	–
gitlab	gitlab	> 18.8.0 , <= 18.8.6	–
gitlab	gitlab	> 18.8.0 , <= 18.8.6	–
gitlab	gitlab	> 18.9.0 , <= 18.9.2	–
gitlab	gitlab	> 18.9.0 , <= 18.9.2	–

Original title

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user, when the `ma...

Original description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user, when the `markdown_placeholders` feature flag was enabled, to inject JavaScript in a browser due to improper sanitization of placeholder content in markdown processing.

nvd CVSS3.1 8.7

Vulnerability type

CWE-79 Cross-site Scripting (XSS)