CVE-2026-35173
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
Chyrp Lite prior to version 2026.01 has an IDOR/Mass Assignment issue in the Post model. Authenticated users with post editing permissions can modify other users' posts by passing internal class properties like id into the post_attributes payload.
Risk Assessment
An attacker can take over other users' posts, leading to content integrity compromise and potential use for further attacks.
Recommendation
Update Chyrp Lite to version 2026.01 or later.
Original NVD description (English source)
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.