Hidden-group membership disclosure via unchecked event invitations
Published Nov 14, 2022 · Updated Apr 23, 2025
Information disclosure in Discourse Calendar before 0.3 allows remote authenticated users to list members of hidden groups through post events. The post-event validator and bulk-invite job accept group names without checking whether the acting user can see the group and its members. Post events must be enabled, and event creation or editing access is required; exploitation reveals membership in private groups or public groups with private member lists.
Summary
What happened
Information disclosure in Discourse Calendar before 0.3 allows remote authenticated users to list members of hidden groups through post events. The post-event validator and bulk-invite job accept group names without checking whether the acting user can see the group and its members. Post events must be enabled, and event creation or editing access is required; exploitation reveals membership in private groups or public groups with private member lists.
The record
- CVE
- CVE-2022-41913
- Published
- Nov 14, 2022
- Updated
- Apr 23, 2025
- Vendor
- Discourse
- Product
- Discourse Calendar
- Classifications
- CWE-200, T1069
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 14, 2022CVE publishedPublication date reported by the CVE source.
- Apr 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 0.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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