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High · 7.2 CVE-2026-29002 EUVD-2026-21384GHSA-6g6q-gcm9-395j

CouchCMS Privilege Escalation via f_k_levels_list Parameter

Published Apr 10, 2026 · Updated Jul 14, 2026 · Assigned by VulnCheck

Description

CouchCMS contains a privilege escalation vulnerability that allows authenticated Admin-level users to create SuperAdmin accounts by tampering with the f_k_levels_list parameter in user creation requests. Attackers can modify the parameter value from 4 to 10 in the HTTP request body to bypass authorization validation and gain full application control, circumventing restrictions on SuperAdmin account creation and privilege assignment.

Affected products

VendorProductAffectedFixed
CouchCMS CouchCMS ≤ 2.4.0 —

References