CVE-2021-43792
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network with a low-privilege account. Limited direct impact.
- Exploit odds
- 0.9% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.9% in the next 30 days (EPSS).
- Severity: 4.3 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.9% · EPSS, next 30 days
- Weakness
- CWE-200 · Information exposure
- Record status
- Modified
Affected
- Discourse < 2.7.11
- Discourse 2.8.0
Attack profile CVSS 3.1 · 4.3
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-43792.md and follow it. Check whether this project is affected by CVE-2021-43792. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/discourse/discourse/commit/cdaf7f4bb3ec268238e4c29a14bb73fad56574b4
- https://github.com/discourse/discourse/security/advisories/GHSA-pq2x-vq37-8522
- https://meta.discourse.org/t/non-forum-staff-getting-notifications-for-staff-only-tags/184895
- https://github.com/discourse/discourse/commit/cdaf7f4bb3ec268238e4c29a14bb73fad56574b4
- https://github.com/discourse/discourse/security/advisories/GHSA-pq2x-vq37-8522
- https://meta.discourse.org/t/non-forum-staff-getting-notifications-for-staff-only-tags/184895
References
- https://github.com/discourse/discourse/commit/cdaf7f4bb3ec268238e4c29a14bb73fad56574b4
- https://github.com/discourse/discourse/security/advisories/GHSA-pq2x-vq37-8522
- https://meta.discourse.org/t/non-forum-staff-getting-notifications-for-staff-only-tags/184895
- https://github.com/discourse/discourse/commit/cdaf7f4bb3ec268238e4c29a14bb73fad56574b4
- https://github.com/discourse/discourse/security/advisories/GHSA-pq2x-vq37-8522
- https://meta.discourse.org/t/non-forum-staff-getting-notifications-for-staff-only-tags/184895