CVE-2026-35672Public exploitNetwork attack vector

Unauthenticated content modification via empty API token

Published May 28, 2026 · Updated May 28, 2026

Authentication bypass in phpMyFAQ before 4.1.3 allows remote attackers to modify FAQ content through API v4.0 with an empty token. DefaultDataSeeder initializes api.apiClientToken to an empty string, and AbstractController::hasValidToken accepts an empty x-pmf-token header as an exact match. The REST API is enabled by default; affected installations permit unauthenticated creation or modification of FAQ entries, categories, and questions.

CVSS severity8.7
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in phpMyFAQ before 4.1.3 allows remote attackers to modify FAQ content through API v4.0 with an empty token. DefaultDataSeeder initializes api.apiClientToken to an empty string, and AbstractController::hasValidToken accepts an empty x-pmf-token header as an exact match. The REST API is enabled by default; affected installations permit unauthenticated creation or modification of FAQ entries, categories, and questions.

The record

CVE
CVE-2026-35672
Published
May 28, 2026
Updated
May 28, 2026
Vendor
Thorsten Rinne
Product
phpMyFAQ
Classifications
CWE-1188, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <4.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Thorsten Rinne · phpMyFAQversion=0 <4.1.3

Published CVSS scores

7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1188Initialization of a Resource with an Insecure Default
T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo