CVE-2026-46360Public exploitNetwork attack vector

Stored XSS via bounded SVG entity decoding

Published May 15, 2026 · Updated May 15, 2026

Stored cross-site scripting in phpMyFAQ before 4.1.2 allows remote authenticated users to execute JavaScript through uploaded SVG files. SvgSanitizer::decodeAllEntities() stops after five decoding passes, leaving nested numeric entities hidden from the javascript URL check until the browser decodes them. Exploitation requires FAQ_EDIT permission and a user to click the stored SVG link, after which code runs in that user's phpMyFAQ-origin session.

CVSS severity5.1
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in phpMyFAQ before 4.1.2 allows remote authenticated users to execute JavaScript through uploaded SVG files. SvgSanitizer::decodeAllEntities() stops after five decoding passes, leaving nested numeric entities hidden from the javascript URL check until the browser decodes them. Exploitation requires FAQ_EDIT permission and a user to click the stored SVG link, after which code runs in that user's phpMyFAQ-origin session.

The record

CVE
CVE-2026-46360
Published
May 15, 2026
Updated
May 15, 2026
Vendor
Thorsten Rinne
Product
phpMyFAQ
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Thorsten Rinne · phpMyFAQversion=0 <4.1.2

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
5.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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