CVE-2026-57996

phpMyFAQ - Privilege Escalation via Missing SuperAdmin Guard in user/add Endpoint

State: Published
Severity: 8.7 High
Published: Jul 15, 2026
Updated: Jul 16, 2026
Reserved: Jun 26, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	VulnCheck

Weaknesses

CWE-269 Improper Privilege Management

Affected Products

Product	Versions
phpMyFAQphpMyFAQ	before 4.1.5Affected 4.1.5Not affected

References

GitHub Security Advisory (GHSA-r2f4-v277-hvw9)vendor-advisory
VulnCheck Advisory: phpMyFAQ - Privilege Escalation via Missing SuperAdmin Guard in user/add Endpointthird-party-advisory

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