CVE-2022-39385 Users erroneously and transparently added to private messages in Discourse
Attackers redeeming invitations can transparently access private messages they should not see, exposing sensitive data in Discourse forums.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-39385?
CVE-2022-39385 is a medium-severity missing authorization vulnerability in Discourse Discourse, published on 14 Nov 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Discourse is the an open source discussion platform. In some rare cases users redeeming an invitation can be added as a participant to several private message topics that they should not be added to. They are not notified of this, it happens transparently in the background. This issue has been resolved in commit `a414520742` and will be included in future releases. Users are advised to upgrade. Users are also advised to set `SiteSetting.max_invites_per_day` to 0 until the patch is installed.
Which versions are affected by CVE-2022-39385?
1 open source package ship an affected version, including discourse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | All versions | 2.8.10 |
Products include Discourse Discourse.
How do I fix CVE-2022-39385?
Upgrade discourse to 2.8.10 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2022-39385 being exploited?
There is no known exploitation of CVE-2022-39385 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-2022-39385, GHSA-gh5r-j595-qx48.