CVE-2026-35173: Chyrplite Chyrp Lite

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Chyrplite Chyrp Lite: before 2026.01 (fixed in 2026.01)

Published 2026-04-06. Last modified 2026-07-24.