CVE-2026-57827: Joomla Extension - rsjoomla.com - Unauthenticated file upload in RSFiles component < 1.17.12

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-07-11 · updated 2026-10-25
Weakness: CWE-434

Description

Joomla Extension - rsjoomla.com - Unauthenticated file upload in RSFiles component < 1.17.12 - The Joomla extension RSFiles is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.

Affected products

RSJoomla! Rsfiles!: before 1.17.12 — fixed in 1.17.12

How to fix

Upgrade to a fixed version: RSJoomla! Rsfiles! 1.17.12. Check the vendor advisory for mitigations.

References

https://mysites.guru/blog/rsfiles-unauthenticated-file-upload-rce/
https://www.rsjoomla.com/joomla-extensions/joomla-download-manager.html

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