Which versions of Discourse are affected by CVE-2025-32376?

Organizations using Discourse should be aware of moderate risk from CVE-2025-32376, a improper access control vulnerability rated CVSS 4.8.. A patch is available.

How to fix or mitigate CVE-2025-32376?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Discourse CVE-2025-32376

Q: What is the CVSS score of CVE-2025-32376?

CVE-2025-32376 has a CVSS 4.0 base score of 4.8 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.2%.

MEDIUM

Improper Access Control (CWE-284)

2025-04-30 security-advisories@github.com

Authentication Bypass Discourse

4.8

CVSS 4.0 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.8 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:39 vuln.today

Patch released

Mar 28, 2026 - 18:39 nvd

Patch available

CVE Published

Apr 30, 2025 - 15:16 nvd

MEDIUM 4.8

DescriptionGitHub Advisory

Discourse is an open-source discussion platform. Prior to versions 3.4.3 on the stable branch and 3.5.0.beta3 on the beta branch, the users limit for a DM can be bypassed, thus giving the ability to potentially create a DM with every user from a site in it. This issue has been patched in stable version 3.4.3 and beta version 3.5.0.beta3.

AnalysisAI

Discourse is an open-source discussion platform. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity.

Technical ContextAI

This vulnerability is classified under CWE-284. Discourse is an open-source discussion platform. Prior to versions 3.4.3 on the stable branch and 3.5.0.beta3 on the beta branch, the users limit for a DM can be bypassed, thus giving the ability to potentially create a DM with every user from a site in it. This issue has been patched in stable version 3.4.3 and beta version 3.5.0.beta3. Affected products include: Discourse. Version information: version 3.4.3.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

More from same product – last 7 days

CVE-2026-44786 HIGH This Week

7.5 Jun 12

Information disclosure in Discourse discussion platform allows any MessageBus subscriber to receive real-time chat messa

CVE-2026-45775 MEDIUM This Month

6.8 Jun 12

Path traversal in Discourse's backup download handler allows an authenticated administrator on one site within a multisi

CVE-2026-44784 MEDIUM This Month

6.5 Jun 12

Discourse group owners can retrieve plaintext SMTP credentials - including passwords, usernames, server, port, and SSL m

CVE-2026-44783 MEDIUM This Month

5.4 Jun 12

Whisper channel access control in Discourse can be bypassed by any authenticated forum user, allowing injection of conte

CVE-2026-45085 MEDIUM This Month

5.3 Jun 12

Discourse chat plugin across versions 2026.1.0-2026.4.x contains four authorization deficiencies (CWE-862) enabling both

CVE-2025-32376 vulnerability details – vuln.today

Back