CVE-2026-48907 -- CVSS 9.8 Vulnerability Briefing

CVE-2026-48907 | CVSS 9.8 (Critical) | Exploit: PoC available

What Is It

CVE-2026-48907 is a critical authentication bypass and remote code execution vulnerability in the Widgetfactorylimited JCE editor extension for Joomla.

Technical Detail

The flaw permits unauthenticated attackers to create new JCE editor profiles without valid authorization. An attacker can use the unauthorized profile creation capability to enable PHP file upload functionality and upload server-executable PHP code. Successful exploitation results in remote code execution in the security context of the web server and may allow full compromise of the Joomla site and underlying host.

Exploitation Status

A proof-of-concept exploit is available. CISA has not listed this vulnerability in the Known Exploited Vulnerabilities catalog as of August 18, 2026, and active exploitation in the wild has not been confirmed in the available data.

Who Is Targeting This

No specific threat actor attribution at this time.

What To Do

Prioritize deployment of the vendor-provided fix or updated JCE release as soon as it is available and validated. Until remediation is complete, restrict access to Joomla administrative and JCE-related endpoints, review JCE profile configuration for unauthorized or newly created profiles, and disable unnecessary file-upload features. Review web server and Joomla logs for unexpected profile creation, uploads of PHP or other executable files, and requests to newly uploaded files. Search web-accessible directories for unauthorized PHP files, remove confirmed malicious content, rotate Joomla and hosting credentials if compromise is suspected, and investigate affected servers for persistence or lateral movement.