Discourse Calendar: Unauth Access to Private Events via UpdateAttn
CVE-2024-26145 Published on February 21, 2024
Uninvited user is able to join and mark the attendance of the the private event
Discourse Calendar adds the ability to create a dynamic calendar in the first post of a topic on Discourse. Uninvited users are able to gain access to private events by crafting a request to update their attendance. This problem is resolved in commit dfc4fa15f340189f177a1d1ab2cc94ffed3c1190. As a workaround, one may use post visibility to limit access.
Vulnerability Analysis
CVE-2024-26145 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2024-26145 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2024-26145
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Affected Versions
discourse-calendar Version >= 2201b254, < dfc4fa15f340189f177a1d1ab2cc94ffed3c1190 is affected by CVE-2024-26145Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.