CVE-2021-43792

Notifications leak in Discourse

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.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.25%
Vendor Advisory discourse.org
Affected: discourse discourse
Published at:
Updated at:

References

Link Tags
https://github.com/discourse/discourse/security/advisories/GHSA-pq2x-vq37-8522 third party advisory
https://github.com/discourse/discourse/commit/cdaf7f4bb3ec268238e4c29a14bb73fad56574b4 third party advisory patch
https://meta.discourse.org/t/non-forum-staff-getting-notifications-for-staff-only-tags/184895 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-43792?
CVE-2021-43792 has been scored as a medium severity vulnerability.
How to fix CVE-2021-43792?
To fix CVE-2021-43792, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-43792 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-43792 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-43792?
CVE-2021-43792 affects discourse discourse.
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