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CVE-2026-85593— phpMyFAQ before 4.1.8 Stored XSS via html_entity_decode

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 4.1.8 之前的版本存在一个存储型跨站脚本（XSS）漏洞，位于方法中。该方法在对已净化的 FAQ 内容调用，从而逆转了原有的实体编码保护机制。拥有 FAQ 编辑权限的已认证用户能够注入 JavaScript 代码，这些代码将在所有浏览受影响 FAQ 页面的用户浏览器中执行。

CVSS 5.4 · Medium Updated Sep 04, 2026

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 2

Vendor	Product	Version Range	Status
thorsten	phpMyFAQ	`< 4.1.8`	affected
		`4.1.8`	unaffected

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Vulnerability Information

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

phpMyFAQ before 4.1.8 Stored XSS via html_entity_decode

Source: CVE Program / CVE List V5

Vulnerability Description

phpMyFAQ versions before 4.1.8 contain a stored cross-site scripting vulnerability in FaqHelper::convertOldInternalLinks() that calls html_entity_decode() on sanitized FAQ content, reversing entity-encoding protection. Authenticated users with FAQ editing privileges can inject JavaScript payloads that execute in the browsers of all users viewing the affected FAQ pages.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
thorsten	phpMyFAQ	0 ~ 4.1.8	-

II. Public POCs for CVE-2026-85593

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-85593

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Vendor Advisories for CVE-2026-85593 (2)

https://www.cve.org/CVERecord?id=CVE-2026-85593

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-2026-85586	6.9 MEDIUM	phpMyFAQ before 4.1.8 CAPTCHA Bypass via store parameter
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-79

V. Comments for CVE-2026-85593

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-85593— phpMyFAQ before 4.1.8 Stored XSS via html_entity_decode

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 2

I. Basic Information for CVE-2026-85593

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-85593

III. Intelligence Information for CVE-2026-85593

Vendor Advisories for CVE-2026-85593 (2)

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

IV. Related Vulnerabilities

V. Comments for CVE-2026-85593

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