# CVE-2026-57827: rsjoomla.com RSFiles Extension For Joomla - Arbitrary File Upload

> Live exploitation tracking for CVE-2026-57827 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2026-57827

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 10.0
- **Public exploit available:** Yes
- **Affected products:** rsjoomla.com RSFiles Extension For Joomla
- **Weaknesses:** CWE-434 (Unrestricted Upload of File with Dangerous Type)
- **Tags:** cms

## 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.

## CrowdSec analysis

[CVE-2026-57827](https://euvd.enisa.europa.eu/vulnerability/CVE-2026-57827) is a critical unauthenticated arbitrary file upload vulnerability in the Rsjoomla.com RSFiles Extension For Joomla versions before 1.17.12. Remote attackers can upload executable files without authentication, potentially achieving full remote code execution and compromising the affected Joomla server.

CrowdSec has been tracking this vulnerability and its exploits since 25th of August 2026.

CrowdSec has not observed any significant exploitation activity targeting CVE-2026-57827 across its network. As a result, no community-driven trend analysis is available for this vulnerability at this time.

Attackers target Joomla’s RSFiles! component endpoints `/index.php?option=com_rsfiles&task=rsfiles.checkupload` and `rsfiles.upload` to bypass authentication and upload executable PHP files. They may then request the uploaded payload under `/downloads/<filename>.php` to achieve unauthenticated remote code execution.

## Timeline

- 2026-07-11: CVE Published. CVE-2026-57827 is published to NVD.
- 2026-08-25: Rule Released. CrowdSec releases a rule to detect CVE-2026-57827 exploitation attempts against the CrowdSec Network.
- 2026-08-28: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2026-57827 for the first time.

## References

- https://mysites.guru/blog/rsfiles-unauthenticated-file-upload-rce/
- https://www.rsjoomla.com/joomla-extensions/joomla-download-manager.html
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-57827.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2026-57827) follows observed exploitation activity for CVE-2026-57827. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.