Main Vulnerability Database Vulnerabilities #VU55580

Cross-site scripting in GitLab Enterprise Edition and Gitlab Community Edition - #VU55580

Published: August 4, 2021

Vulnerability identifier: #VU55580

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

CVE-ID: N/A

CWE-ID: CWE-79

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in Mermaid Markdown rendering. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Affected software

GitLab Enterprise Edition
Gitlab Community Edition

Remediation

Install updates from vendor's website.

GitLab Enterprise Edition - update to 14.1.2
Gitlab Community Edition - update to 14.1.2

External References

https://gitlab.com/gitlab-org/gitlab/-/raw/master/CHANGELOG.md

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