Medium severity · published Mar 17, 2023
CVE-2023-23622
Discourse is an open-source discussion platform
4.3
CVSS
0.5%
EPSS
No
On KEV
Description
Discourse is an open-source discussion platform. Prior to version 3.0.1 of the `stable` branch and version 3.1.0.beta2 of the `beta` and `tests-passed` branches, the count of topics displayed for a tag is a count of all regular topics regardless of whether the topic is in a read restricted category or not. As a result, any users can technically poll a sensitive tag to determine if a new topic is created in a category which the user does not have excess to.
In version 3.0.1 of the `stable` branch and version 3.1.0.beta2 of the `beta` and `tests-passed` branches, the count of topics displayed for a tag defaults to only counting regular topics which are not in read restricted categories. Staff users will continue to see a count of all topics regardless of the topic's category read restrictions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
Discourse · Discourse
before 3.0.0; 1.1.0; 1.1.0; 1.1.0; 1.1.0; 1.1.0; +34 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-23622
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-23622
Patch
https://github.com/discourse/discourse/commit/105fee978d73b0ec23ff814a09d1c0c9ace95164
Patch
https://github.com/discourse/discourse/commit/ecb9aa5dba94741d9579f4f873f0675f48b4184f
Issue Tracking
https://github.com/discourse/discourse/pull/20004
Issue Tracking
https://github.com/discourse/discourse/pull/20005
Vendor Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-2wvr-4x7w-v795
More from Discourse
9.9
CVE-2025-68662
FinalDestination hostname matching allows SSRF protection bypass
9.8
CVE-2025-53102
Discourse's WebAuthn challenge isn't cleared from user session after authentication
9.8
CVE-2025-48877
Discourse is an open-source discussion platform
9.8
CVE-2023-47121
Discourse is an open source platform for community discussion
9.8
CVE-2021-41163
Discourse is an open source platform for community discussion
