CVE-2026-65891: CWE-20 – Improper Input Validation in joomlacontenteditor.net Joomla Content Editor (JCE) extension for Joomla
Joomla Extension - joomlacontenteditor.net - Creation of hidden files and unintended file overwrite via rename function in Joomla Content Editor (JCE) < 2.20.2 - Improper input validation in the file rename functionality allowed an authenticated user with file management permissions to rename files to otherwise invalid names, resulting in the creation of hidden files. The issue also allowed existing files at the destination path to be unintentionally replaced.
AI Analysis
Technical Summary
CVE-2026-65891 describes an improper input validation vulnerability (CWE-20) in the file rename functionality of the Joomla Content Editor (JCE) extension for Joomla versions 1.0.0 through 2.9.99.9. Authenticated users with file management permissions can exploit this flaw to rename files to otherwise invalid names, which results in the creation of hidden files. Additionally, the vulnerability allows existing files at the destination path to be unintentionally overwritten due to lack of proper validation and checks during the rename operation.
Potential Impact
The vulnerability can lead to unintended file overwrites and creation of hidden files, potentially allowing an authenticated user with file management permissions to manipulate files in ways not intended by the application. This could disrupt file integrity and application behavior. There is no indication of confidentiality or availability impact. The CVSS score is 6.5 (medium severity) with impact primarily on integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch link is provided in the available data. Until a patch is available, restrict file management permissions to trusted users only to reduce risk.
CVE-2026-65891: CWE-20 – Improper Input Validation in joomlacontenteditor.net Joomla Content Editor (JCE) extension for Joomla
Description
Joomla Extension - joomlacontenteditor.net - Creation of hidden files and unintended file overwrite via rename function in Joomla Content Editor (JCE) < 2.20.2 - Improper input validation in the file rename functionality allowed an authenticated user with file management permissions to rename files to otherwise invalid names, resulting in the creation of hidden files. The issue also allowed existing files at the destination path to be unintentionally replaced.
CVSS v3.1
Score 6.5medium
Affected software
joomlacontenteditor.net
Joomla Content Editor (JCE) extension for Joomla
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-65891 describes an improper input validation vulnerability (CWE-20) in the file rename functionality of the Joomla Content Editor (JCE) extension for Joomla versions 1.0.0 through 2.9.99.9. Authenticated users with file management permissions can exploit this flaw to rename files to otherwise invalid names, which results in the creation of hidden files. Additionally, the vulnerability allows existing files at the destination path to be unintentionally overwritten due to lack of proper validation and checks during the rename operation.
Potential Impact
The vulnerability can lead to unintended file overwrites and creation of hidden files, potentially allowing an authenticated user with file management permissions to manipulate files in ways not intended by the application. This could disrupt file integrity and application behavior. There is no indication of confidentiality or availability impact. The CVSS score is 6.5 (medium severity) with impact primarily on integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch link is provided in the available data. Until a patch is available, restrict file management permissions to trusted users only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Joomla
- Date Reserved
- 2026-07-23T09:31:17.506Z
- State
- PUBLISHED
Threat ID: 6a69fea19c2644c7f88f56cf
Added to database: 07/29/2026, 13:22:41 UTC
Last enriched: 08/05/2026, 14:26:39 UTC
Last updated: 09/12/2026, 02:54:05 UTC
Views: 88
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