HOMEVULNERABILITIESCVE-2024-21641
MEDIUM

CVE-2024-21641

CWE-601Published: January 5, 2024· Updated: Jun 17, 2026

4.7
CVSS v3.1

Official Description

Flarum is open source discussion platform software. Prior to version 1.8.5, the Flarum `/logout` route includes a redirect parameter that allows any third party to redirect users from a (trusted) domain of the Flarum installation to redirect to any link. For logged-in users, the logout must be confirmed. Guests are immediately redirected. This could be used by spammers to redirect to a web address using a trusted domain of a running Flarum installation. The vulnerability has been fixed and published as flarum/core v1.8.5. As a workaround, some extensions modifying the logout route can remedy this issue if their implementation is safe.

NVD Source

Technical Analysis

CVE-2024-21641 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeChanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Affected Vendors & Products

flarum1 product(s)
flarum
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/flarum/flarum-core/commit/ee8b3b4ad1413a2b0971fdd9e40f812d2a3a9d3a
PATCHhttps://github.com/flarum/framework/commit/7d70328471cf3091d92d95c382d277aec7996176
PATCHhttps://github.com/flarum/framework/security/advisories/GHSA-733r-8xcp-w9mr
PATCHhttps://github.com/flarum/flarum-core/commit/ee8b3b4ad1413a2b0971fdd9e40f812d2a3a9d3a
PATCHhttps://github.com/flarum/framework/commit/7d70328471cf3091d92d95c382d277aec7996176
PATCHhttps://github.com/flarum/framework/security/advisories/GHSA-733r-8xcp-w9mr

All References (6)

→
https://github.com/flarum/flarum-core/commit/ee8b3b4ad1413a2b0971fdd9e40f812d2a3a9d3aPatch
→
https://github.com/flarum/framework/commit/7d70328471cf3091d92d95c382d277aec7996176Patch
→
https://github.com/flarum/framework/security/advisories/GHSA-733r-8xcp-w9mrPatch · Vendor Advisory
→
https://github.com/flarum/flarum-core/commit/ee8b3b4ad1413a2b0971fdd9e40f812d2a3a9d3aPatch
→
https://github.com/flarum/framework/commit/7d70328471cf3091d92d95c382d277aec7996176Patch
→
https://github.com/flarum/framework/security/advisories/GHSA-733r-8xcp-w9mrPatch · Vendor Advisory

Quick Facts

CVE IDCVE-2024-21641
CVSS Score4.7 / 10
SeverityMEDIUM
WeaknessCWE-601
CISA KEVNo
Affected1 vendor(s)
PublishedJan 5, 2024

Related CVEs (CWE-601)

CVE-2025-55031
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CVE-2024-22891
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CVE-2022-31657
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CVE-2026-61451
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CVE-2026-6795
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CVE-2022-40083
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Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2024-21641 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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