CVE-2026-57827

CRITICAL

Joomla Extension - rsjoomla.com - Unauthenticated file upload in RSFiles component < 1.17.12

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2026-57827. PoCs published by Candisexterior171, shinthink.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2026-57827, an unauthenticated arbitrary file upload vulnerability in RSFiles! Joomla component (< 1.17.12). The exploit bypasses pre-flight checks by directly calling the unguarded `rsfiles.upload` task, allowing PHP shell upload to web-accessible directories for RCE.

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.

Exploits (2)

github WORKING POC
by Candisexterior171 · pythonpoc
https://github.com/Candisexterior171/CVE-2026-57827

This repository contains a functional exploit for CVE-2026-57827, an unauthenticated arbitrary file upload vulnerability in RSFiles! Joomla component (< 1.17.12). The exploit bypasses pre-flight checks by directly calling the unguarded `rsfiles.upload` task, allowing PHP shell upload to web-accessible directories for RCE.

Classification
Working Poc 99%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: RSFiles! Joomla Component versions < 1.17.12
No auth needed
Prerequisites: RSFiles! component installed on Joomla · Target version < 1.17.12 · Web-accessible downloads/briefcase directory (default configuration)
mistral-large-3 · analyzed Jul 31, 2026 Full analysis →
github WORKING POC
by shinthink · pythonpoc
https://github.com/shinthink/CVE-2026-57827

This repository contains a functional exploit for CVE-2026-57827, a critical unauthenticated file upload vulnerability in RSFiles! Joomla component (<1.17.12). The exploit bypasses the split-controller design flaw by directly calling the unguarded write task (rsfiles.upload), allowing arbitrary PHP file upload to web-accessible directories for RCE.

Classification
Working Poc 99%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: RSFiles! Joomla Component versions < 1.17.12
No auth needed
Prerequisites: RSFiles! component installed on Joomla (<1.17.12) · Web-accessible downloads/briefcase directory (default configuration)
mistral-large-3 · analyzed Jul 30, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 9.8
EPSS 0.0040
EPSS Percentile 33.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-434
Status published
Products (2)
rsjoomla/rsfiles\! < 1.17.12
rsjoomla.com/rsjoomla.com RSFiles extension for Joomla 1.0-1.17.11
Published Jul 11, 2026
Tracked Since Jul 11, 2026