Detect Widget Factory Joomla Content Editor Improper Access Control (CVE-2026-48907) in Elastic Security
Detects exploitation of CVE-2026-48907, an improper access control vulnerability (CWE-284) in the Joomla Content Editor (JCE) plugin by Widget Factory. This vulnerability is actively exploited in the wild (CISA KEV) and allows attackers to bypass access controls, potentially enabling unauthorized file uploads, remote code execution, or administrative actions within Joomla CMS installations.
MITRE ATT&CK
Elastic Detection Query
sequence by source.ip with maxspan=5m
[network where event.category == "network_traffic" and http.request.method in ("POST", "PUT")
and (
url.path : "*/index.php*" and url.query : "*option=com_jce*"
or url.path : "*/components/com_jce*"
or url.path : "*/plugins/editors/jce*"
)
and url.query : ("*task=plugin*", "*task=upload*", "*task=save*")
and http.response.status_code in (200, 201, 302)
] with runs=3Uses EQL sequence detection to identify repeated exploitation attempts against JCE plugin endpoints from the same source IP within a 5-minute window, reducing noise from single isolated requests.
Data Sources
Required Tables
False Positives & Tuning
- Legitimate batch content operations by editors performing bulk uploads through JCE
- CMS automation scripts performing scheduled content synchronization
- Penetration testers conducting authorized assessments of Joomla deployments
Other platforms for CVE-2026-48907
Testing Methodology
Validate this detection against 3 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Unauthenticated JCE Plugin Task Enumeration
Expected signal: HTTP 200 response to unauthenticated POST request targeting com_jce plugin task endpoint; web server access log entry with POST method, 200 status, and option=com_jce in query string
- Test 2JCE File Upload via Access Control Bypass
Expected signal: Multipart POST request to com_jce imgmanager upload endpoint; filesystem write event in Joomla images directory; PHP process creating new file in web-accessible path
- Test 3JCE Administrator Action Impersonation via Access Control Bypass
Expected signal: POST request to JCE task endpoint returning 200 with directory listing or JCE interface content rather than 403/401 response; web server access log confirming successful response to unauthenticated request
References (5)
- https://www.joomlacontenteditor.net/news/jce-security-update-and-a-free-patch-for-older-sites
- https://www.joomlacontenteditor.net/support/changelog/editor
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-48907
Unlock Pro Content
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