CVE-2026-56396Public exploitNetwork attack vector

SuperAdmin escalation via unguarded user-rights mutations

Published Jun 21, 2026 · Updated Jun 21, 2026

Missing authorization in phpMyFAQ before 4.1.4 allows remote authenticated users with edit_user permission to gain SuperAdmin access. UserController::editUser() accepts is_superadmin and calls setSuperAdmin(), while updateUserRights() grants requested rights without a SuperAdmin guard. A logged-in non-SuperAdmin administrator with edit_user permission and valid CSRF tokens can promote any account or assign arbitrary rights.

CVSS severity8.7
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in phpMyFAQ before 4.1.4 allows remote authenticated users with edit_user permission to gain SuperAdmin access. UserController::editUser() accepts is_superadmin and calls setSuperAdmin(), while updateUserRights() grants requested rights without a SuperAdmin guard. A logged-in non-SuperAdmin administrator with edit_user permission and valid CSRF tokens can promote any account or assign arbitrary rights.

The record

CVE
CVE-2026-56396
Published
Jun 21, 2026
Updated
Jun 21, 2026
Vendor
Thorsten Rinne
Product
phpMyFAQ
Classifications
CWE-862, CWE-639, CWE-269, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Thorsten Rinne · phpMyFAQversion=0 <4.1.4

Published CVSS scores

8.1GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8.8VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-639Authorization Bypass Through User-Controlled Key
CWE-269Improper Privilege Management
T1098Account Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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