Critical Joomla JCE Vulnerability Under Active Exploitation

Bleepingcomputer

Critical Joomla JCE Vulnerability Under Active Exploitation

First seen 17 Jun 2026, 11:11 UTC • •87.2

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ThreatCluster •June 18, 2026 at 10:42 UTC

•CVE-2026-48907 allows unauthenticated remote code execution on Joomla sites using JCE.
•CISA added this vulnerability to its KEV catalog on June 16, 2026, confirming active exploitation.
•Site owners must update to JCE 2.9.99.6 and check for unauthorized profiles and web shells.

A critical vulnerability in the Joomla Content Editor (JCE), tracked as CVE-2026-48907, allows unauthenticated attackers to execute remote code on affected Joomla sites. This flaw affects JCE versions below 2.9.99.6 and has a CVSS score of 10.0. Attackers exploit this vulnerability by importing rogue editor profiles to upload PHP web shells without any authentication. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added this vulnerability to its Known Exploited Vulnerabilities catalog on June 16, 2026, indicating active exploitation in the wild. Automated scanning campaigns have targeted numerous Joomla sites, with hundreds already compromised. Site owners are urged to update to the latest version immediately and check for signs of exploitation, including unauthorized profiles and suspicious PHP files in writable directories. The vulnerability has been confirmed by multiple sources, including security advisories and independent analyses.

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Updated 145d ago How this analysis works

Timeline

2026-06-05

CVE-2026-48907 published

The critical vulnerability in JCE was disclosed, allowing remote code execution.

2026-06-09

Public PoC exploit released

Working exploit code for CVE-2026-48907 was published on GitHub, facilitating automated attacks.

2026-06-16

CISA adds CVE-2026-48907 to KEV catalog

CISA confirmed active exploitation of the JCE vulnerability, urging immediate patching.

2026-06-17

JCE security update released

JCE Pro 2.9.99.6 was released to address the vulnerability and harden the system against attacks.

2026-06-17

Widespread exploitation reported

Hundreds of Joomla sites were found compromised due to the JCE vulnerability, with automated attacks ongoing.

More articles in this cluster (34)

Threat Graph

6 entities, 9 inferred relationships (STIX 2.1).

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Technique (2)

Malware
T1505.003 - Web Shell

Vulnerability (1)

CVE-2026-48907

Affected Platform (3)

Joomla
Joomla Content Editor
PHP

Relationships

CVE-2026-48907 targets Joomla
CVE-2026-48907 targets Joomla Content Editor
CVE-2026-48907 targets PHP
Malware targets Joomla
Malware targets Joomla Content Editor
Malware targets PHP
T1505.003 - Web Shell targets Joomla
T1505.003 - Web Shell targets Joomla Content Editor
T1505.003 - Web Shell targets PHP

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