How to fix or mitigate CVE-2026-61424?

Within 24 hours: immediately disable and remove the DJ-Classifieds extension from all affected Joomla instances, preserve server logs for forensic analysis, and verify no unauthorized file uploads have occurred. Within 7 days: conduct full server forensics to identify if systems were compromised, apply comprehensive security audit across all Joomla installations, and segment affected systems from critical infrastructure if compromise is suspected. Within 30 days: implement Web Application Firewall (WAF) rules to restrict arbitrary file uploads, deploy file integrity monitoring, establish inventory controls for all Joomla plugins/extensions, and monitor vendor security advisories for a patch release-when available, test thoroughly before production deployment.

CVE-2026-61424

Q: What is the CVSS score of CVE-2026-61424?

CVE-2026-61424 has a CVSS 4.0 base score of 10.0 (Critical). CVSS vector: 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:X/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:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.3%.

EUVD-2026-46087 CRITICAL

Unrestricted Upload of File with Dangerous Type (CWE-434)

2026-07-20 security@joomla.org

GHSA-pvrv-pcwc-vq7w

File Upload

10.0

CVSS 4.0 · Vendor: joomla

Severity by source

Vendor (joomla) PRIMARY

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:X/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:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (joomla) · only source for this CVE.

CVSS VectorVendor: joomla

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Jul 20, 2026 - 19:30 vuln.today

CVE Published

Jul 20, 2026 - 19:17 cve.org

CRITICAL 10.0

DescriptionCVE.org

The Joomla extension DJ-Classifieds is vulnerable to an unauthenticated file upload, leading to full RCE.

AnalysisAI

Unauthenticated file upload in the DJ-Classifieds extension for Joomla allows remote attackers to upload arbitrary files and achieve full remote code execution on the underlying web server, without any authentication or user interaction. The flaw carries a maximum CVSS 4.0 score of 10.0 and is classified as CWE-434 (unrestricted upload of dangerous file types); a third-party technical write-up (mysites.guru) exists, but no public exploit code or CISA KEV listing has been confirmed at the time of analysis. Any Joomla site running this classifieds/listings extension is exposed to complete server compromise.