CVE-2026-65891: Joomla Extension - joomlacontenteditor.net - Creation of hidden files and unintended file overwrite via rename function in Joomla Content Editor (JCE) < 2.9.99.10

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-29 · updated 2026-10-23
Weakness: CWE-20

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.

Affected products

joomlacontenteditor.net Joomla Content Editor (JCE) extension for Joomla: before 2.20.2 — fixed in 2.20.2

How to fix

Upgrade to a fixed version: joomlacontenteditor.net Joomla Content Editor (JCE) extension for Joomla 2.20.2. Check the vendor advisory for mitigations.

References

https://www.joomlacontenteditor.net/

Get alerted when CVE-2026-65891 or the next vulnerability affects your stack