Cross-site scripting in Flarum - CVE-2022-41938
Published: November 18, 2022 / Updated: April 20, 2026
Vulnerability identifier: #VU126531
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2022-41938
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Flarum
Affected software:
Flarum
Flarum
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary script in a victim's browser.
The vulnerability exists due to cross-site scripting in the page title system when rendering discussion titles as HTML DOM nodes. A remote user can create or rename a discussion with malicious HTML markup to execute arbitrary script in a victim's browser.
User interaction is required to open the relevant discussion page.
How to mitigate CVE-2022-41938
Install security update from vendor's website.