Multiple vulnerabilities in Discourse



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2025-24808
CVE-2025-24972
CWE-ID CWE-362
CWE-284
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Discourse
Web applications / Forum & blogging software

Vendor Civilized Discourse Construction Kit, Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Race condition

EUVDB-ID: #VU106103

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-24808

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a race condition when adding users to a group DM. A remote user can exploit the race and send requests to add new users in parallel ignoring the limit.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.3.0 beta1 - 3.4.0 beta4

CPE2.3 External links

https://github.com/discourse/discourse/commit/a16b2f224860f6678f89f5ffa012f0ede17e4095
https://github.com/discourse/discourse/security/advisories/GHSA-hfcx-qjw6-573r


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper access control

EUVDB-ID: #VU106104

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-24972

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote user can bypass user preference when adding users to chat groups.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.3.0 beta1 - 3.4.0 beta4

CPE2.3 External links

https://github.com/discourse/discourse/security/advisories/GHSA-4p63-qw6g-4mv2


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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