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4.3

Discourse can add users to group chats despite opt‑out

CVE-2025-24972 · published 1 year ago
Summary

In older versions of the Discourse discussion platform, a user who turned off direct messaging could still be placed into group chat conversations. This could expose them to messages they chose not to receive. Upgrade to the latest version or apply the provided workaround that respects the user’s chat preference.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
discourse discourse < 3.3.4
< 3.4.0
3.4.0
cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*
Original advisory text
Discourse may bypass user preference when adding users to chat groups
Discourse is an open-source discussion platform. Prior to versions `3.3.4` on the `stable` branch and `3.4.0.beta5` on the `beta` branch, in specific circumstances, users could be added to group direct messages despite disabling direct messaging in their preferences. Versions `3.3.4` and `3.4.0.beta5` contain a patch for the issue. A workaround is available. If a user disables chat in their preferences then they cannot be added to new group chats.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
4.3 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-862Missing Authorization
Timeline
Published26 Mar 2025
Updated4 Nov 2026
First seen7 Mar 2026
Sources
CVE-2025-24972 · NVD
CVE-2025-24972 · OSV
GHSA-4p63-qw6g-4mv2 · GHSA
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