CVE-2026-29002CWE-639

CouchCMS Privilege Escalation via f_k_levels_list Parameter

High · published April 10, 2026

CVSS v4.0
8.6
EPSS
1%
Percentile
51.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.6 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00661 · 51.0th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-04-10T15:11Z
EPSS history
Timeline
  • 10 APR 15:11Z
    CouchCMS Privilege Escalation via f_k_levels_list Parameter
    cvelistv5