TYPO3-EXT-SA-2026-020: Broken Access Control in extension "Industry Directory" (yellowpages2)

• Release Date: August 25, 2026
• Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
• Component: "Industry Directory" (yellowpages2)
• Composer Package Name: jweiland/yellowpages2
• Vulnerability Type: Broken Access Control
• Affected Versions: 8.1.1 and below
• Severity: High
• Suggested CVSS v4.0: AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
• References: CVE-2026-77142, CWE-862, CWE-639

Problem Description

The frontend company self-service editing feature relies on a template-level visibility flag to hide the edit form for company records a visitor does not own, but the corresponding write operation does not repeat this ownership check on the server side. As a result, a visitor who knows the identifier of a company record from the public directory can submit a modified update request for that record directly and overwrite its data, without the application ever confirming that the visitor owns it.

Solution

Updated version 8.1.2 is available from the TYPO3 extension manager, packagist and at

https://extensions.typo3.org/extension/download/yellowpages2/8.1.2/zip

Users of the extension are advised to update the extension as soon as possible.

Credits

Thanks to Seungbin Yang for reporting the vulnerability, and to Hoja Mustaffa Abdul Latheef for providing an updated version of the extension.

General Advice

Follow the recommendations that are given in the TYPO3 Security Guide.