CVE-2021-43792

Name: CVE-2021-43792
Creator: NVD / NIST
Published: 2021-12-01T20:15:08.433+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.83%

Last modified Jun 17, 2026

CVE-2021-43792 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Discourse is an open source discussion platform. In affected versions a vulnerability affects users of tag groups who use the "Tags are visible only to the following groups" feature. EPSS estimates a 0.83% chance of exploitation in the next 30 days.

Description

Discourse is an open source discussion platform. In affected versions a vulnerability affects users of tag groups who use the "Tags are visible only to the following groups" feature. A tag group may only allow a certain group (e.g. staff) to view certain tags. Users who were tracking or watching the tags via /preferences/tags, then have their staff status revoked will still see notifications related to the tag, but will not see the tag on each topic. This issue has been patched in stable version 2.7.11. Users are advised to upgrade as soon as possible.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.83%

52.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions	Update
Discourse	Discourse	< 2.7.11	—
Discourse	Discourse	2.8.0	Beta1

References

https://github.com/discourse/discourse/commit/cdaf7f4bb3ec268238e4c29a14bb73fad56574b4Patch, Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-pq2x-vq37-8522Third Party Advisory
https://meta.discourse.org/t/non-forum-staff-getting-notifications-for-staff-only-tags/184895Vendor Advisory
https://github.com/discourse/discourse/commit/cdaf7f4bb3ec268238e4c29a14bb73fad56574b4Patch, Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-pq2x-vq37-8522Third Party Advisory
https://meta.discourse.org/t/non-forum-staff-getting-notifications-for-staff-only-tags/184895Vendor Advisory

Timeline

Published: Dec 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43792?

How severe is CVE-2021-43792?

CVE-2021-43792 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.83% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43792?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43792?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST