CVE-2026-29002
CouchCMS Privilege Escalation via f_k_levels_list Parameter
- State
- Published
- Severity
- 8.6 High
- Published
- Apr 10, 2026
- Updated
- Jul 14, 2026
- Reserved
- Mar 3, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | 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 | VulnCheck |
| 3.1 | 7.2 High | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
CouchCMSCouchCMS |
|
References
- https://gist.github.com/thepiyushkumarshukla/477e2d2bbbe8cc3ec0d640c50f0cf9e1technical-descriptionexploit
- https://www.couchcms.com/product
- https://www.vulncheck.com/advisories/couchcms-privilege-escalation-via-f-k-levels-list-parameterthird-party-advisory
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