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Known exploited vulnerability

CVE-2026-48907

criticalCVSS 4.0 10.0In CISA KEVEPSS 85%Published · joomlacontenteditor.net

The short answer

CVE-2026-48907 affects joomlacontenteditor.net Joomla Content Editor (JCE) extension for Joomla and is rated critical (CVSS 10.0). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-06-16: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-284.

Severity

10.0 critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:Red

Exploited (CISA KEV)

Yes, since Jun 16, 2026

Federal due date Jun 19, 2026

EPSS, next 30 days

85%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Attack requirements
None
Privileges required
None
User interaction
None
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for…

Affected products

Joomla Content Editor (JCE) extension for Joomla. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-48907 being exploited?

Yes. CISA added CVE-2026-48907 to its Known Exploited Vulnerabilities catalog on 2026-06-16, with a federal remediation due date of 2026-06-19.

How do I fix CVE-2026-48907?

CISA's required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for…

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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