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CVE-2026-117551 Joomla Extension - jdownloads.com - RCE through file upload in jDownloads < 4.1.8

10.0 criticalEPSS 0.4%

Critical (10.0) in jdownloads.com jdownloads extension for joomla. EPSS 0.4% estimated probability of exploitation activity in the next 30 days.

On this page
Joomla Extension - jdownloads.com - RCE through file upload in jDownloads < 4.1.8 - Insufficient validation of frontend thumbnail uploads allowed users with upload permission to place executable files on the server. This results in PHP code execution.

Severity

CVSS 4.0

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/AU:Y
EPSS
0.4% estimated probability of exploitation activity in the next 30 days; 39th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC)
Exploitation: none · Automatable: yes · Technical impact: total, assessed 2026-11-12. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-434 Unrestricted Upload of File with Dangerous Type
OWASP Top 10
A06:2025 Insecure Design
Published
Modified
Assigned by
Joomla (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

  • jdownloads.com:jdownloads extension for joomla

Versions

From the CNA's record in the CVE List.

ProductAffected
jdownloads.com jDownloads extension for Joomla1.0.0-4.1.7

Attack patterns (CAPEC)

  • CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs Likelihood: High · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

Check your stackJSON