CVE-2026-34974Public exploitNetwork attack vector

Editor-to-admin takeover via entity-encoded SVG links

Published Apr 2, 2026 · Updated Apr 2, 2026

Stored XSS in Thorsten Rinne phpMyFAQ before 4.1.1 allows remote authenticated users to execute JavaScript through an uploaded SVG. SvgSanitizer.php tests href values for a literal javascript: prefix without decoding HTML entities, so encoded URLs pass isSafe() and render inline. An account with edit_faq permission must upload the file and an administrator must open and click its link, after which same-origin script can create an administrator account or read and alter application data.

CVSS severity5.4
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Thorsten Rinne phpMyFAQ before 4.1.1 allows remote authenticated users to execute JavaScript through an uploaded SVG. SvgSanitizer.php tests href values for a literal javascript: prefix without decoding HTML entities, so encoded URLs pass isSafe() and render inline. An account with edit_faq permission must upload the file and an administrator must open and click its link, after which same-origin script can create an administrator account or read and alter application data.

The record

CVE
CVE-2026-34974
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
Thorsten Rinne
Product
phpMyFAQ
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 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=< 4.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Thorsten Rinne · phpMyFAQversion=< 4.1.1

Published CVSS scores

5.4GitHubCVSS: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.

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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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