Vulnerability CVE-2022-41938


Published: 2022-11-19

Description:
Flarum is an open source discussion platform. Flarum's page title system allowed for page titles to be converted into HTML DOM nodes when pages were rendered. The change was made after `v1.5` and was not noticed. This allowed an attacker to inject malicious HTML markup using a discussion title input, either by creating a new discussion or renaming one. The XSS attack occurs after a visitor opens the relevant discussion page. All communities running Flarum from `v1.5.0` to `v1.6.1` are impacted. The vulnerability has been fixed and published as flarum/core `v1.6.2`. All communities running Flarum from `v1.5.0` to `v1.6.1` have to upgrade as soon as possible to v1.6.2. There are no known workarounds for this issue.

Type:

CWE-79

(Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

 References:
https://github.com/flarum/framework/security/advisories/GHSA-7x4w-j98p-854x
https://github.com/flarum/framework/commit/690de9ce0ffe7ac4d45b73e303f44340c3433138
https://discuss.flarum.org/d/27558

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