CVE-2026-77142
Received Received - Intake

Unauthorized Data Overwrite in Frontend Company Self-Service

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: TYPO3

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.

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Meta Information

Published
2026-08-25
Last Modified
2026-08-25
Generated
2026-08-25
AI Q&A
2026-08-25
EPSS Evaluated
N/A
NVD
CVE-2026-77142
EUVD
EUVD-2026-65334

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
typo3 industry_directory to 8.1.2 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

This is a Broken Access Control vulnerability in the TYPO3 extension 'Industry Directory' (yellowpages2). The frontend editing feature hides the edit form for records not owned by the visitor using a template flag, but the server does not verify ownership during write operations. An attacker who knows a company record's identifier can submit an update request and overwrite its data without authorization.

Detection Guidance

To detect this vulnerability, check if the TYPO3 extension 'Industry Directory' (yellowpages2) is running versions 8.1.1 or below. Use the TYPO3 extension manager or command line to verify the installed version. Look for unauthorized modifications to company records by reviewing server logs for unexpected update requests.

Impact Analysis

An attacker could modify or delete company records they do not own, leading to data tampering, misinformation, or loss of critical business information. This could disrupt operations, damage reputation, or cause financial harm if sensitive data is altered.

Compliance Impact

This vulnerability could violate data integrity and access control requirements in GDPR and HIPAA. Unauthorized modifications to company records may lead to non-compliance, potential fines, and loss of trust due to improper handling of personal or sensitive data.

Mitigation Strategies

Immediately update the 'Industry Directory' extension to version 8.1.2 or later via the TYPO3 extension manager, Packagist, or the official TYPO3 extensions repository. After updating, audit company records for unauthorized changes and ensure server-side ownership checks are enforced.

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