CVE-2026-117551 PUBLISHED

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

Assigner: Joomla
Reserved: 27.10.2026 Published: 12.11.2026 Updated: 13.11.2026

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.

Metrics

CVSS 4.0

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:A/AU:Y
CVSS Score: 10

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	jdownloads.com
Product	jDownloads extension for Joomla
Versions	Default: unaffected Version 1.0.0-4.1.7 is affected

Credits

Fadilulah Ajeigbe finder

References

https://www.jdownloads.com/

Problem Types

CWE-434 Unrestricted Upload of File with Dangerous Type CWE