Cross-site scripting in GitLab Enterprise Edition and Gitlab Community Edition - CVE-2020-26407
Published: December 10, 2020 / Updated: December 11, 2020
Vulnerability identifier: #VU48937
CSH Severity: Medium
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: CVE-2020-26407
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed via importing a malicious project in Zoom Meeting URL. 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
Gitlab Community Edition
How to mitigate CVE-2020-26407
Install update from vendor's website.
GitLab Enterprise Edition - addressed in versions 13.4.7, 13.5.5, 13.6.2
Gitlab Community Edition - addressed in versions 13.4.7, 13.5.5, 13.6.2
Gitlab Community Edition - addressed in versions 13.4.7, 13.5.5, 13.6.2