Improper access control in Discourse - CVE-2023-23935
Published: March 16, 2023 / Updated: July 1, 2026
Vulnerability identifier: #VU136077
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-23935
CWE-ID: CWE-284
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 tag personal message count handling when viewing tags. A remote user can poll a sensitive tag to disclose sensitive information.
User interaction is required to view the tag.
Affected software
Discourse
How to mitigate CVE-2023-23935
Install security update from vendor's website.
Discourse - addressed in versions 3.0.1, 3.1.0 beta2