Cross-site scripting in Gitlab Community Edition - CVE-2018-18643
Published: October 30, 2018
Vulnerability identifier: #VU15573
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: CVE-2018-18643
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 the fragment identifier (hash) of several pages in GitLab contained a lack of input validation and output encoding issue. 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 Community Edition
Arch Linux
Arch Linux
How to mitigate CVE-2018-18643
The vulnerability has been fixed in the versions 11.4.3, 11.3.8, 11.2.7.
Gitlab Community Edition - addressed in versions 11.2.7, 11.3.8, 11.4.3