CVE-2026-29002
HIGHCouchCMS Privilege Escalation via f_k_levels_list Parameter
Title source: cnaDescription
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.
References (3)
Core 3
Core References
Exploit technical-description
exploit
https://gist.github.com/thepiyushkumarshukla/477e2d2bbbe8cc3ec0d640c50f0cf9e1
Product product
https://www.couchcms.com/
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/couchcms-privilege-escalation-via-f-k-levels-list-parameter
Scores
CVSS v3
7.2
EPSS
0.0043
EPSS Percentile
33.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-639
Status
published
Products (2)
couchcms/couchcms
< 2.4
CouchCMS/CouchCMS
< 2.4.0
Published
Apr 10, 2026
Tracked Since
Apr 10, 2026