Description
The frontend topic editing flow does not verify on the server side that the requesting visitor owns the topic being modified. As a result, a visitor who knows the identifier of a topic from the public forum can submit a modified update request for that topic directly and overwrite its content, without the application confirming ownership. Topic identifiers are visible in the public forum listing, and exploitation requires no privileged access or non-default configuration.
Published: 2026-08-25
Score: 8.8 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Tue, 25 Aug 2026 09:15:00 +0000

Type Values Removed Values Added
Description The frontend topic editing flow does not verify on the server side that the requesting visitor owns the topic being modified. As a result, a visitor who knows the identifier of a topic from the public forum can submit a modified update request for that topic directly and overwrite its content, without the application confirming ownership. Topic identifiers are visible in the public forum listing, and exploitation requires no privileged access or non-default configuration.
Title Broken Access Control in extension "Forum" (pforum)
Weaknesses CWE-639
CWE-862
References
Metrics cvssV4_0

{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: TYPO3

Published:

Updated: 2026-08-25T09:00:34.130Z

Reserved: 2026-08-20T13:10:15.962Z

Link: CVE-2026-77143

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-25T09:17:35.333

Modified: 2026-08-25T09:17:35.333

Link: CVE-2026-77143

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-639

    Authorization Bypass Through User-Controlled Key

  • CWE-862

    Missing Authorization