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CVE-2026-57996— phpMyFAQ - Privilege Escalation via Missing SuperAdmin Guard in user/add Endpoint

Quick assessment

Affected
phpMyFAQ phpMyFAQ
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

phpmyfaq是phpmyfaq团队开源的一套FAQ知识库管理系统。 phpmyfaq 4.1.5之前版本存在权限许可和访问控制问题漏洞，该漏洞源于user/add API端点存在权限提升问题，允许非SuperAdmin管理员创建SuperAdmin账户，导致完全接管实例。

CVSS 8.8 · High EPSS 0.44% · P36

Affected Version Matrix 2

VendorProduct Version RangeStatus
phpMyFAQ phpMyFAQ < 4.1.5 affected
4.1.5 unaffected
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I. Basic Information for CVE-2026-57996

Vulnerability Information
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Vulnerability Title
phpMyFAQ - Privilege Escalation via Missing SuperAdmin Guard in user/add Endpoint
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
phpmyfaq 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
phpmyfaq是phpmyfaq团队开源的一套FAQ知识库管理系统。 phpmyfaq 4.1.5之前版本存在权限许可和访问控制问题漏洞，该漏洞源于user/add API端点存在权限提升问题，允许非SuperAdmin管理员创建SuperAdmin账户，导致完全接管实例。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
phpMyFAQ phpMyFAQ 0 ~ 4.1.5 -

II. Public POCs for CVE-2026-57996

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11144 chars
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In-depth vulnerability mechanism
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POC zip download
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III. Intelligence Information for CVE-2026-57996

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Vendor Advisories for CVE-2026-57996 (2)

IV. Related Vulnerabilities

Same product: phpMyFAQ
Same vendor: phpMyFAQ
Same weakness: CWE-269

V. Comments for CVE-2026-57996

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