Information disclosure in Discourse - CVE-2022-39385
Published: November 14, 2022 / Updated: July 1, 2026
Vulnerability identifier: #VU136067
CSH Severity: Medium
CVSS v4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-39385
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in private message topic participant handling when redeeming an invitation. A remote user can redeem an invitation to disclose sensitive information.
In rare cases, the user can be transparently added as a participant to multiple private message topics without notification.
Affected software
Discourse
How to mitigate CVE-2022-39385
Install security update from vendor's website.
Discourse - addressed in versions 2.8.10, 2.9.0 beta11