CVE-2026-29002

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.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://gist.github.com/thepiyushkumarshukla/477e2d2bbbe8cc3ec0d640c50f0cf9e1	Exploit Third Party Advisory
https://www.couchcms.com/	Product
https://www.vulncheck.com/advisories/couchcms-privilege-escalation-via-f-k-levels-list-parameter	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:couchcms:couchcms:*:*:*:*:*:*:*:*

History

16 Apr 2026, 19:41

Type	Values Removed	Values Added
CPE		cpe:2.3:a:couchcms:couchcms::::::::
References	~~() https://gist.github.com/thepiyushkumarshukla/477e2d2bbbe8cc3ec0d640c50f0cf9e1 -~~	() https://gist.github.com/thepiyushkumarshukla/477e2d2bbbe8cc3ec0d640c50f0cf9e1 - Exploit, Third Party Advisory
References	~~() https://www.couchcms.com/ -~~	() https://www.couchcms.com/ - Product
References	~~() https://www.vulncheck.com/advisories/couchcms-privilege-escalation-via-f-k-levels-list-parameter -~~	() https://www.vulncheck.com/advisories/couchcms-privilege-escalation-via-f-k-levels-list-parameter - Third Party Advisory
First Time		Couchcms Couchcms couchcms

10 Apr 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-10 16:16

Updated : 2026-04-16 19:41

NVD link : CVE-2026-29002

Mitre link : CVE-2026-29002

CVE.ORG link : CVE-2026-29002

JSON object : View

Products Affected

couchcms

couchcms

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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