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CISA KEV · ACTIVELY EXPLOITED
CRITICAL severity

CVE-2026-48907 — jce

CRITICAL

CVE-2026-48907 is a critical-severity (CVSS 9.8) CWE-284 vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2026-06-16) — treat it as actively exploited and patch now. A fix is available — see the affected versions and patch details below.

Published
Updated
Affected
1 product
Patched
See advisory
Exploits
7 known
Exploitation data as of Oct 28, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

  • Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2026-06-16. Federal agencies were required to remediate by 2026-06-19.
  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2026-48907.

EPSS Exploitation Probability

via FIRST.org ↗
85.4%probability of exploitation in next 30 days
Very High Risk+69.25%
Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk
0.00%33.3%66.7%100.0%80.4%55.9%78.1%16.2%85.4%Jul 26Sep 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2026-48907 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 397,508 CVEs with a current EPSS score, this one falls in the 50–90% band (highlighted). Counts from FIRST.org, log-scaled.

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.

Affected Products

1 product · 1 configurations
Application
jcewidgetfactorylimited
< 2.9.99.5
range
Exploits & PoCs
7

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-52645webappsmultiple

Joomla JCE_2.9.15 - Remote Code Execution

by Jared Brits · Aug 17, 2026

Exploit-DB Source
EDB-52630webappsmultiple

Joomla 2.9.99.4 - Unauthenticated Remote Code Execution

by Jared Brits · Aug 10, 2026

Exploit-DB Source

Detection & mitigation playbook

Vulnerability

  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Fix

    Upgrade the affected component to the fixed release for CVE-2026-48907, or apply your distribution's backported patch — distro builds are often patched at an older version number, so check your vendor's advisory rather than the upstream version alone.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

How to detect CVE-2026-48907

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2026-48907 -u https://target
Template
Joomla! JCE extension < 2.9.99.5 unauthenticated RCE
Severity
critical
Impact
Unauthenticated attackers can upload and execute arbitrary PHP code, leading to full remote code execution on the server.
Remediation
Update to the latest version of the JCE editor extension.

Template by ProjectDiscovery nuclei-templates (ywh-jfellus), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

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.
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Actively Exploited: CVE-2026-48907: jce (Critical 9.8)