CVE-2026-35173 Details
Description
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.
A vulnerability allowing Insecure Direct Object Reference (IDOR) and Mass Assignment has been identified in Chyrp Lite versions prior to 2026.01. This issue allows authenticated users with post editing permissions to modify posts they do not own and are not authorized to edit. The vulnerability arises in the Post model, where internal class properties can be injected into the post_attributes payload. This manipulation enables an attacker to alter the object being instantiated, leading to unauthorized modifications on another user's post, effectively allowing post takeover.
Users can update to Chyrp Lite version 2026.01, which addresses this vulnerability by preventing the overwriting of class properties in the Post model with injected attribute values.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 6, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/xenocrat/chyrp-lite/security/advisories/GHSA-8c3h-rh2j-fxr9 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
| CWE-914 | Improper Control of Dynamically-Identified Variables | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| chyrplite chyrp lite | < 2026.01 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 14, 2026 | Initial Analysis | [email protected] |
| Apr 6, 2026 | New CVE Received | [email protected] |