CVE-2022-41913: Discourse-calendar exposes members of hidden groups
Discourse-calendar is a plugin for the Discourse messaging platform which adds the ability to create a dynamic calendar in the first post of a topic. Members of private groups or public groups with private members can be listed by users, who can create and edit post events. This vulnerability only affects sites which have discourse post events enabled. This issue has been patched in commit ca5ae3e7e which will be included in future releases. Users unable to upgrade should disable the discourseposteventenabled setting to fully mitigate the issue. Also, it's possible to prevent regular users from using this vulnerability by removing all groups from the discourseposteventallowedongroups but note that moderators will still be able to use it.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch ca5ae3e7e - Configuration
To prevent regular users from using the vulnerability, remove all groups from `discourse_post_event_allowed_on_groups` (note: moderators will still be able to use it).
Discourse-calendar discourse_post_event_allowed_on_groups = remove all groups - Configuration
If you cannot upgrade, disable `discourse_post_event_enabled` to fully mitigate the issue (only applies when discourse post events are enabled).
Discourse discourse_post_event_enabled = disabled
Event History
Frequently Asked Questions
What is the severity of CVE-2022-41913?
CVE-2022-41913 has been rated as a moderate severity vulnerability due to the potential exposure of private group member information.
How do I fix CVE-2022-41913?
To fix CVE-2022-41913, update the Discourse Calendar plugin to the latest version that addresses this vulnerability.
What versions are affected by CVE-2022-41913?
CVE-2022-41913 specifically affects version 0.2 of the Discourse Calendar plugin.
What type of vulnerability is CVE-2022-41913?
CVE-2022-41913 is a security vulnerability related to unauthorized access to member information in the Discourse Calendar plugin.
Is there a known exploit for CVE-2022-41913?
As of now, there are no publicly known exploits specifically targeting CVE-2022-41913.