phpMyFAQ through 4.1.10 Missing Authorization via MCP Server faq_search Tool

Advisories

phpMyFAQ through 4.1.10 Missing Authorization via MCP Server faq_search Tool

severity: medium
date: 10/11/2026
Affecting: phpMyFAQ >= 4.1.0, <= 4.1.10
CVE: CVE-2026-108851
CWE: CWE-862 Missing Authorization
CVSS: 4.8
CVSS V4 Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
References: https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/phpmyfaq-mcp-search-visibility
https://github.com/thorsten/phpMyFAQ/blob/4.1.10/phpmyfaq/src/phpMyFAQ/Search.php#L137-L194
https://github.com/thorsten/phpMyFAQ/blob/4.1.10/phpmyfaq/src/phpMyFAQ/Service/McpServer/FaqSearchToolExecutor.php#L56-L102
https://github.com/thorsten/phpMyFAQ
Credit: hieuPenguinnn
Description: phpMyFAQ through 4.1.10 contains a missing authorization vulnerability in the MCP server faq_search tool that allows MCP clients to read restricted FAQs because Search::searchDatabase() never applies user or group permission checks. Attackers connected to the phpmyfaq:mcp:server can issue search queries to retrieve the full question and answer text of active FAQs restricted to specific users or groups.

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