CVE-2026-24420Public exploitNetwork attack vector

Authenticated attachment disclosure via permissive permission check

Published Jan 24, 2026 · Updated Jan 24, 2026

Improper access control in phpMyFAQ 4.0.16 and earlier allows remote authenticated users to download restricted FAQ attachments. In attachment.php, the access decision uses isset() on the dlattachment permission, so a present but false right passes, while its group-and-user conditional can collapse to group permission alone. A non-admin account, an attachment linked to an FAQ record, and disabled guest downloads are required; successful requests disclose attachment contents without granting write access.

CVSS severity6.5
Medium
EPSS probability0.44%
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

Improper access control in phpMyFAQ 4.0.16 and earlier allows remote authenticated users to download restricted FAQ attachments. In attachment.php, the access decision uses isset() on the dlattachment permission, so a present but false right passes, while its group-and-user conditional can collapse to group permission alone. A non-admin account, an attachment linked to an FAQ record, and disabled guest downloads are required; successful requests disclose attachment contents without granting write access.

The record

CVE
CVE-2026-24420
Published
Jan 24, 2026
Updated
Jan 24, 2026
Vendor
Thorsten Rinne
Product
phpMyFAQ
Classifications
CWE-284, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 24, 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=< 4.0.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Thorsten Rinne · phpMyFAQversion=< 4.0.17

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-284Improper Access Control
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