EUVD-2026-19420CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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3Description
Chyrp Lite is an ultra-lightweight blogging engine. Prior to 2026.01, an IDOR / Mass Assignment issue exists in the Post model that allows authenticated users with post editing permissions (Edit Post, Edit Draft, Edit Own Post, Edit Own Draft) to modify posts they do not own and do not have permission to edit. By passing internal class properties such as id into the post_attributes payload, an attacker can alter the object being instantiated. As a result, further actions are performed on another user’s post rather than the attacker’s own post, effectively enabling post takeover. This vulnerability is fixed in 2026.01.
Analysis
Chyrp Lite prior to version 2026.01 allows authenticated users with post editing permissions to modify posts owned by other users through an insecure direct object reference (IDOR) and mass assignment vulnerability in the Post model. Attackers can inject internal class properties such as post IDs into the post_attributes payload to alter which post is being edited, effectively enabling unauthorized post takeover. …
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