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Advisories

CouchCMS Privilege Escalation via f_k_levels_list Parameter

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severity
high
date
Affecting

  • CouchCMS <= 2.4.0

  • An affected version range remains undefined

CWE
  • CWE-639 Authorization Bypass Through User-Controlled Key
CVSS
8.6
CVSS V4 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
Credit
Piyush Kumar Shukla
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.

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