CVE-2022-41938

MEDIUM
Published Nov 19, 20223y ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Medium
Find Similar
Published Nov 19, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.4
Exploitability
2.3
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 1

VendorProductVersionRange
flarumflarum*≥1.5.0  –  <1.6.2

References 3

  • discuss.flarum.org https://discuss.flarum.org/d/27558
    Vendor Advisory
  • github.com https://github.com/flarum/framework/commit/690de9ce0ffe7ac4d45b73e303f44340c3433138
    PatchThird Party Advisory
  • github.com https://github.com/flarum/framework/security/advisories/GHSA-7x4w-j98p-854x
    Third Party Advisory

Remediation

  • github.com https://github.com/flarum/framework/commit/690de9ce0ffe7ac4d45b73e303f44340c3433138
    PatchThird Party Advisory