CVE-2026-67283

Deferred Deferred - Pending Action

Improper ACL Implementation in Cotton Cloud Extension Allows File Operations

Publication date: 2026-08-12

Last updated on: 2026-08-26

Assigner: Joomla! Project

Description

Joomla Extension - tabaoca.org - Improper ACL implementation allows file operations in Cotton Cloud < 2.0.2 - Unauthenticated users could perform various file-related operations (read, delete, overwrite, re-assign permissions) on every file managed within the extension.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-12

Last Modified

2026-08-26

Generated

2026-09-01

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-31

NVD

CVE-2026-67283

EUVD

EUVD-2026-57152

Affected Vendors & Products

Vendor	Product	Version / Range
tabaoca	cotton_cloud	to 2.0.2 (exc)
tabaoca	gabble_chat	*
tabaoca	tabapapo_chat	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper Access Control List (ACL) implementation in Joomla extensions Cotton Cloud, Gabble Chat, and Tabapapo Chat versions below 2.0.2. It allows unauthenticated users to perform unauthorized file operations such as reading, deleting, overwriting, or changing permissions on any file managed by these extensions.

Detection Guidance

Check for unauthorized file operations in Cotton Cloud, Gabble Chat, or Tabapapo Chat extensions. Review server logs for unusual activity related to file reads, deletions, or permission changes. Inspect PHP and MySQL configurations for misconfigured limits like post_max_size or upload_max_filesize.

Impact Analysis

An attacker could exploit this to access, modify, or delete sensitive files, disrupt services, or escalate privileges. This could lead to data breaches, system downtime, or unauthorized access to confidential information stored or managed by these Joomla extensions.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR and HIPAA by enabling unauthorized access to personal or health data. GDPR requires strict access controls and data protection, while HIPAA mandates safeguards for protected health information. Exploitation may result in data breaches, triggering legal penalties and reputational damage.

Mitigation Strategies

Update Cotton Cloud, Gabble Chat, and Tabapapo Chat to the latest versions. Restrict file operations to authenticated users only. Review and tighten PHP and MySQL server configurations to prevent excessive resource usage. Implement proper input validation and access controls.

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