Vulnerability details
CVE-2026-29002
CouchCMS CouchCMS
CouchCMS Privilege Escalation via f_k_levels_list Parameter
CVSS 4.0
8.6High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.6High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 7.2High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| CouchCMS | CouchCMS | v ≤ 2.4.0 | CVEProject cvelistV5 (CNA) |
References and advisories
3- https://gist.github.com/thepiyushkumarshukla/477e2d2bbbe8cc3ec0d640c50f0cf9e1 technical-descriptionexploit
- https://www.couchcms.com/ product
- https://www.vulncheck.com/advisories/couchcms-privilege-escalation-via-f-k-levels-list-parameter third-party-advisory
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Details
- Published
- 2026-04-10
- Last updated
- 2026-07-14
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.44%
Probability of exploitation in 30 days
38.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-639Authorization Bypass Through User-Controlled Key