High severity · published Jul 15, 2026
CVE-2026-57996
phpMyFAQ - Privilege Escalation via Missing SuperAdmin Guard in user/add Endpoint
8.8
CVSS
0.4%
EPSS
No
On KEV
Description
phpMyFAQ before 4.1.5 contains a privilege escalation vulnerability in the user/add API endpoint that allows non-SuperAdmin administrators to create SuperAdmin accounts. A delegated administrator with USER_ADD/EDIT/DELETE permissions can call POST /admin/api/user/add with isSuperAdmin: true and attacker-chosen credentials to create a SuperAdmin account, then authenticate as that account to achieve full instance takeover.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PH
phpMyFAQ · phpMyFAQ
before 4.1.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57996
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57996
github.com
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-r2f4-v277-hvw9
www.vulncheck.com
https://www.vulncheck.com/advisories/phpmyfaq-privilege-escalation-via-missing-superadmin-guard-in-user-add-endpoint
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