CVE-2025-32376 Discourse DM limits aren’t always properly enforced
Attackers can bypass direct message user limits to create DMs with all site users, potentially exposing private user data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-32376?
CVE-2025-32376 is a medium-severity vulnerability in Discourse Discourse, published on 30 Apr 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-284
Which versions are affected by CVE-2025-32376?
1 open source package ship an affected version, including discourse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | All versions | 3.4.3 |
Products include Discourse Discourse.
How do I fix CVE-2025-32376?
Upgrade discourse to 3.4.3 or later.
Is CVE-2025-32376 being exploited?
There is no known exploitation of CVE-2025-32376 in the wild and no public exploit code.
Other vulnerabilities in Discourse Discourse
- CVE-2021-41163 RCE via malicious SNS subscription payload
- CVE-2022-36066 Discourse vulnerable to RCE via admins uploading maliciously zipped file
- CVE-2022-39356 Discourse user account takeover via email and invite link
- CVE-2023-22468 Discourse vulnerable to Cross-site Scripting in local oneboxes
- CVE-2026-27934 Discourse leaks private topic title and post excerpt via user action API endpoint
Sources
Also known as BIT-discourse-2025-32376, GHSA-mqqq-h2x3-46fr.