CVE-2026-111903

phpMyFAQ 4.2.0-alpha before 4.2.0-beta Stored XSS via SVG DTD Entity Bypass

CVSS score

5.1

EPSS probability

—

Risk score

0.5

Published

16 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

Checking session…

Vulnerability description

CVE AI research

The stored explanation is shown at once; refreshing evaluates the sources again.

DayBreach AI Explanation

Verified against sources

phpMyFAQ SVG DTD Entity Bypass Vulnerability

Sources read

Source agreement

0/2

Evidence confidence

%44

Short explanation

A stored cross-site scripting vulnerability affects the SvgSanitizer component in phpMyFAQ.

Why does it matter?

Users with FAQ_EDIT permissions can upload an SVG to bypass sanitization mechanisms and hijack administrator sessions.

What should be done?

Follow vendor advisories for updates
Check the phpMyFAQ version
Review user permissions

Note on uncertainty

2 alanda kaynak uyuşmazlığı var. DayBreach bu değerleri saklamadı; kaynak karşılaştırması aşağıda gösteriliyor.

Chain of evidence and sources2 verified claims

phpMyFAQ 4.2.0-alpha ve 4.2.0-beta öncesi sürümlerde SvgSanitizer bileşenini etkileyen bir depolanmış XSS zafiyeti bulunmaktadır.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Saldırganlar FAQ_EDIT yetkisini kullanarak XML DTD özel varlıkları yardımıyla sanitasyon mekanizmalarını atlayabilir.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Show the technical text from the sources

phpMyFAQ 4.2.0-alpha before 4.2.0-beta contains a stored cross-site scripting vulnerability in SvgSanitizer that allows users with FAQ_EDIT permission to bypass sanitization using XML DTD custom entities. Attackers can upload an SVG defining an entity that expands to javascript in an anchor href, executing script when viewers click it to hijack admin sessions.

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CWE: CWE-79

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-111903 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	thorsten	phpMyFAQ	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
5.4	CVSS V31	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	NVD
5.4	CVSS V3_1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	CVE CNA
5.1	CVSS V40	MEDIUM	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD
5.1	CVSS V4_0	MEDIUM	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-111903 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-111903 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsLow

User—

Official Sources and Advisories

GitHub Security Advisory (GHSA-j3v5-p957-w6gq)vendor-advisory VulnCheck Advisory: phpMyFAQ 4.2.0-alpha before 4.2.0-beta Stored XSS via SVG DTD Entity Bypassvendor-advisory

CVSS Vector Radar Chart

5.1 / 10

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow privileges

User InteractionP

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)P

Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

thorsten

Weakness Type (CWE & CAPEC)

CWE-79

Similar Vulnerabilities

9.3

CVE-2026-111911phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAuthn Credential Injection

Vendorthorsten ProductphpMyFAQ

Patch status unknown16 h ago

8.7

CVE-2026-111908phpMyFAQ 4.0.0 before 4.1.9 and 4.2.0-alpha before 4.2.0-beta BOLA in FAQ Update via REST API

Vendorthorsten ProductphpMyFAQ

Patch status unknown16 h ago

8.7

CVE-2026-111901phpMyFAQ 4.2.0-alpha before 4.2.0-beta Unauthenticated DoS via API Pagination

Vendorthorsten ProductphpMyFAQ

Patch status unknown16 h ago

8.7

CVE-2026-111884phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Missing Current-Password Step-Up on E-mail Change Enables Account Takeover

Vendorthorsten ProductphpMyFAQ

Patch status unknown16 h ago

8.6

CVE-2026-111882phpMyFAQ 3.2.0-alpha before 4.1.9 and 4.2.0-alpha before 4.2.0-beta TOTP 2FA Bypass via SSO Callbacks

Vendorthorsten ProductphpMyFAQ

Patch status unknown16 h ago

8.5

CVE-2026-111893phpMyFAQ 4.2.0-alpha before 4.2.0-beta Privilege Escalation via Group Category Restrictions API

Vendorthorsten ProductphpMyFAQ

Patch status unknown16 h ago

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free key Documentation

curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-111903"

phpMyFAQ 4.2.0-alpha before 4.2.0-beta Stored XSS via SVG DTD Entity Bypass

Impact on My Inventory

Vulnerability description

DayBreach AI Explanation

Short explanation

What should be done?

IMPACT: Affected Products and Software

Affected Products

RED HAT CSAF/VEX: Product Impact Check

SCORING: CVSS from Multiple Sources

CVSS Scores

Patch and Remediation Guide

Solution & Remediation Advisory

Public exploit and active exploitation status

Verified exploit intelligence

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

Common Attack Pattern Enumeration and Classification (CAPEC)

Attack Vector and Accessibility

Official Sources and Advisories

CVSS Vector Radar Chart

Vulnerability Scoring Details

Weakness Type (CWE & CAPEC)

Similar Vulnerabilities

Get this vulnerability through the API

DayBreach

Glossary & Reference

Directories & Feeds

RSS & Integration