Discourse
CVE-2026-33251
MEDIUM
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Lifecycle Timeline
2DescriptionGitHub Advisory
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an authorization bypass vulnerability in hidden Solved topics may allow unauthorized users to accept or unaccept solutions. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, ensure only trusted users are part of the Site Setting for accept_all_solutions_allowed_groups.
AnalysisAI
An authorization bypass vulnerability in Discourse versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 allows authenticated users to accept or unaccept solutions in hidden Solved topics without proper authorization checks. The vulnerability affects the open-source Discourse discussion platform and permits users with valid credentials to manipulate solution status across topics they should not have access to, resulting in information disclosure and integrity violations. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Vulnerability AssessmentAI
| Risk Assessment | The CVSS v3.1 score of 5.4 (Medium) with vector AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N indicates this is a moderate-severity issue with networked attack vector, low complexity, and requirement for prior user authentication. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An authenticated but unprivileged user on a Discourse community discovers a hidden troubleshooting topic where a solution has been marked incorrectly. Rather than requesting the topic creator or moderator to fix it, the attacker crafts HTTP requests to the solution acceptance API endpoint with the topic ID and post ID of their chosen solution, bypassing authorization checks that should restrict modification to topic creators and moderators only. … |
| Remediation | Upgrade Discourse to version 2026.3.0-latest.1, 2026.2.1, or 2026.1.2 or later immediately, following the patched versions appropriate to your release track as documented at https://github.com/discourse/discourse/security/advisories/GHSA-vm2x-9h8x-7jxm. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 30 days: Identify affected systems running hidden Solved topics may allow unauthorized users to accept and apply vendor patches as part of regular patch cycle. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More from same product – last 7 days
Information disclosure in Discourse discussion platform allows any MessageBus subscriber to receive real-time chat messa
Path traversal in Discourse's backup download handler allows an authenticated administrator on one site within a multisi
Discourse group owners can retrieve plaintext SMTP credentials - including passwords, usernames, server, port, and SSL m
Whisper channel access control in Discourse can be bypassed by any authenticated forum user, allowing injection of conte
Discourse chat plugin across versions 2026.1.0-2026.4.x contains four authorization deficiencies (CWE-862) enabling both
Share
External POC / Exploit Code
Leaving vuln.today