CVE-2021-43792: Notifications leak in Discourse
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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2021-43792?
CVE-2021-43792 has been classified as a moderate severity vulnerability affecting user privacy.
How do I fix CVE-2021-43792?
To fix CVE-2021-43792, upgrade Discourse to version 2.7.11 or above.
What versions are affected by CVE-2021-43792?
CVE-2021-43792 affects Discourse versions up to 2.7.11 and beta versions of 2.8.0.
What risk does CVE-2021-43792 pose to users of Discourse?
CVE-2021-43792 may allow unauthorized users to view tags intended only for specific groups.
Is there a workaround for CVE-2021-43792?
There is no documented workaround for CVE-2021-43792; upgrading Discourse is recommended.