What is CVE-2025-32376?

CVE-2025-32376 is a medium-severity vulnerability in Discourse, classified under Improper Access Control. CVSS score: 4.3/10. Published 2025-04-30.

How severe is CVE-2025-32376?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Discourse

CVE-2025-32376

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.

Published 2025-04-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (15.8th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Discourse — versions 1.7.0, 1.2.0, 2.4.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

github.com/discourse/discourse/security/advisories/GHSA-mqqq-h2x3-46fr (Vendor Advisory)
github.com/discourse/discourse/commit/21a7f3162221c393f9bb13721451aa7f237d881a (Patch)

Frequently asked questions

What is CVE-2025-32376?: CVE-2025-32376 is a medium-severity vulnerability in Discourse, classified under Improper Access Control. CVSS score: 4.3/10. Published 2025-04-30.
How severe is CVE-2025-32376?: Medium severity. CVSS v3 base score is 4.3 out of 10.