thorsten phpMyFAQ up to 4.1.5 Group Controller updateMembers privileges management

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k2.91

Summaryinfo

A vulnerability described as problematic has been identified in thorsten phpMyFAQ up to 4.1.5. This issue affects the function GroupController::updateMembers of the component Group Controller. Such manipulation leads to privileges management. This vulnerability is documented as CVE-2026-66399. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in thorsten phpMyFAQ up to 4.1.5 and classified as problematic. Affected by this issue is the function GroupController::updateMembers of the component Group Controller. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

phpMyFAQ before 4.1.6 contains a privilege escalation vulnerability in GroupController::updateMembers() that allows administrators with only group-management permissions to join privileged groups without verification of required rights. Attackers can add themselves to pre-existing groups holding user-management rights and immediately inherit those permissions to modify or delete user accounts.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-66399 since 07/26/2026. The exploitation is known to be easy. The attack may be launched remotely. The exploitation needs additional levels of successful authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 4.1.6 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: phpMyFAQ 4.1.6

Timelineinfo

07/26/2026 CVE reserved
07/27/2026 +1 days Advisory disclosed
07/27/2026 +0 days VulDB entry created
07/27/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-66399 (🔒)
GCVE (CVE): GCVE-0-2026-66399
GCVE (VulDB): GCVE-100-383486

Entryinfo

Created: 07/27/2026 18:26
Changes: 07/27/2026 18:26 (57)
Complete: 🔍
Cache ID: 216::103

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