phpMyFAQ before 4.1.8 Stored XSS via html_entity_decode
Published Sep 4, 2026
5.1
MEDIUMCVSS 4.0
EPSS 0.24%
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.
Affected products
-
- Version 0StatusaffectedConstraints<4.1.8
- Version 4.1.8StatusunaffectedConstraints-
- Version
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
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
1 other source (NVD) ▾
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
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 14, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.24% (0.00235) | 13.08th | v5 (v2026.06.15) |
| Sep 5, 2026 | 0.14% (0.00138) | 3.49th | v5 (v2026.06.15) |
References (2)
- https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-x6qj-5jhf-xgpm vendor-advisory
- https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.8-stored-xss-via-html-entity-decode third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-x6qj-5jhf-xgpm | vendor-advisory | |
| https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.8-stored-xss-via-html-entity-decode | third-party-advisory |
Change history (0)
No recorded changes yet.