CVE-2026-73371: CWE-284 Improper Access Control in Joomla! Project Joomla! CMS
Joomla! Core - [20260808] - Improper ACL checks for batch copy actions in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper access check allows unauthorized users to perform copy batch operations on uneditable items.
AI Analysis
Technical Summary
This vulnerability in Joomla! CMS (CVE-2026-73371) is due to improper access control (CWE-284) in batch copy actions. Specifically, in versions 4.0.0 to 5.4.6 and 6.0.0 to 6.1.2, the system fails to correctly verify permissions, enabling unauthorized users with high privileges to copy batch items that are normally uneditable. The CVSS 4.0 base score is 5.1, indicating medium severity. There is no vendor advisory or patch information currently available to confirm remediation status.
Potential Impact
Unauthorized users with high privileges can perform batch copy operations on items they are not authorized to edit. This could lead to unauthorized duplication of content or configuration within the Joomla! CMS environment. The impact is limited by the requirement for high privileges and does not involve user interaction or network complexity beyond normal access.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict high privilege access to trusted users only and monitor for unusual batch copy activity. Avoid granting unnecessary batch operation permissions.
CVE-2026-73371: CWE-284 Improper Access Control in Joomla! Project Joomla! CMS
Description
Joomla! Core - [20260808] - Improper ACL checks for batch copy actions in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper access check allows unauthorized users to perform copy batch operations on uneditable items.
CVSS v4.0
Score 5.1medium
Affected software
pkg:composer/joomla/joomla-cmsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Joomla! CMS (CVE-2026-73371) is due to improper access control (CWE-284) in batch copy actions. Specifically, in versions 4.0.0 to 5.4.6 and 6.0.0 to 6.1.2, the system fails to correctly verify permissions, enabling unauthorized users with high privileges to copy batch items that are normally uneditable. The CVSS 4.0 base score is 5.1, indicating medium severity. There is no vendor advisory or patch information currently available to confirm remediation status.
Potential Impact
Unauthorized users with high privileges can perform batch copy operations on items they are not authorized to edit. This could lead to unauthorized duplication of content or configuration within the Joomla! CMS environment. The impact is limited by the requirement for high privileges and does not involve user interaction or network complexity beyond normal access.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict high privilege access to trusted users only and monitor for unusual batch copy activity. Avoid granting unnecessary batch operation permissions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Joomla
- Date Reserved
- 2026-08-12T14:00:09.041Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8482f1c6e8be03326f9aaf
Added to database: 08/18/2026, 16:06:09 UTC
Last enriched: 08/18/2026, 16:21:19 UTC
Last updated: 08/19/2026, 05:05:07 UTC
Views: 9
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