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Critical Joomla Editor Flaw Could Let Hackers Run Malicious Code

A serious security flaw has been found in the Joomla Content Editor (JCE) that lets unauthorised users create new editor profiles and upload harmful code. This vulnerability is actively being exploited, meaning attackers are using it now to compromise websites. Small organisations using this editor should act quickly to protect their sites.

17 June 2026

Reference: CVE-2026-48907

1. What is being reported?

The Joomla Content Editor, a tool used to manage website content, has a security weakness that allows anyone—even without logging in—to create new editor profiles. This can lead to attackers uploading and running harmful code on the website server.

2. What this means in plain English

If your website uses this editor, hackers could take control of your site, potentially stealing data, damaging your site, or using it to attack others. This is a serious risk that could disrupt your online presence and harm your reputation.

3. Could this affect a small business?

Small businesses or organisations using Joomla with the JCE extension are at risk, especially if their website is accessible from the internet. Those not using Joomla or this editor are not affected.

4. What to do now

  • Check if your website uses Joomla with the JCE editor extension.
  • Contact your IT provider or website manager to confirm if the site is vulnerable.
  • Apply any security updates or mitigations provided by the Joomla or Widget Factory promptly.
  • If updates are not available, consider disabling the JCE editor or taking the website offline until it is secured.

5. Ask your IT provider

Can you confirm if our Joomla website uses the JCE editor, and if so, have you applied the latest security updates to protect against the CVE-2026-48907 vulnerability?

6. Bottom line

If you use Joomla with the JCE editor, act quickly to update or secure your site to prevent hackers from taking control.

Information based on CISA KEV, NVD, and reputable security news reports.

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