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CVE-2026-85586— phpMyFAQ before 4.1.8 CAPTCHA Bypass via store parameter

Quick assessment

Affected
thorsten phpMyFAQ
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

phpMyFAQ是德国phpMyFAQ团队开源的一个常见问题解答管理系统。 phpMyFAQ 4.1.8之前版本存在资源管理错误漏洞，该漏洞源于当问题提交请求中store参数设置为“now”时未能验证CAPTCHA，可能导致未经身份验证的攻击者绕过CAPTCHA保护并无限提交问题，造成数据库污染和触发外发邮件通知。

CVSS 6.9 · Medium EPSS 0.49% · P41

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
thorsten phpMyFAQ < 4.1.8 affected
4.1.8 unaffected
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I. Basic Information for CVE-2026-85586

Vulnerability Information
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Vulnerability Title
phpMyFAQ before 4.1.8 CAPTCHA Bypass via store parameter
Source: CVE Program / CVE List V5
Vulnerability Description
phpMyFAQ versions before 4.1.8 fail to validate CAPTCHA when the store parameter is set to 'now' in question submission requests. Unauthenticated attackers can bypass CAPTCHA protection and submit unlimited questions directly, causing database pollution and triggering outgoing mail notifications.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
交互频率的控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
phpMyFAQ 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
phpMyFAQ是德国phpMyFAQ团队开源的一个常见问题解答管理系统。 phpMyFAQ 4.1.8之前版本存在资源管理错误漏洞，该漏洞源于当问题提交请求中store参数设置为“now”时未能验证CAPTCHA，可能导致未经身份验证的攻击者绕过CAPTCHA保护并无限提交问题，造成数据库污染和触发外发邮件通知。
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
thorsten phpMyFAQ 0 ~ 4.1.8 -

II. Public POCs for CVE-2026-85586

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III. Intelligence Information for CVE-2026-85586

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Vendor Advisories for CVE-2026-85586 (2)

Same Patch Batch · thorsten · 2026-09-04 · 8 CVEs total

CVE-2026-85591 7.1 HIGH phpMyFAQ before 4.1.8 Authentication Bypass via Unverified Password Change
CVE-2026-85590 7.1 HIGH phpMyFAQ before 4.1.8 Authentication Bypass via Two-Factor Disable
CVE-2026-85593 5.4 MEDIUM phpMyFAQ before 4.1.8 Stored XSS via html_entity_decode
CVE-2026-85587 5.3 MEDIUM phpMyFAQ before 4.1.8 Incorrect Authorization via Admin Pages
CVE-2026-85588 5.3 MEDIUM phpMyFAQ before 4.1.8 TOTP Secret Exposure via Data Export
CVE-2026-85589 5.3 MEDIUM phpMyFAQ before 4.2.0-alpha.2 Missing Authorization via Dashboard API
CVE-2026-85592 3.7 LOW phpMyFAQ before 4.1.8 Authorization Bypass via question/create

IV. Related Vulnerabilities

Same product: phpMyFAQ
Same vendor: thorsten
Same weakness: CWE-799

V. Comments for CVE-2026-85586

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