SB2022111865 - Cross-site scripting in Flarum

Description

This security bulletin contains information about 1 vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2022-41938)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• https://github.com/flarum/framework/security/advisories/GHSA-7x4w-j98p-854x
• https://github.com/advisories/GHSA-7x4w-j98p-854x