Arbitrary file upload in Rsjoomla Rsfiles\!
CVE-2026-57827
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.
Vulnerability class: Unrestricted File Upload
EPSS: 0.023 (82.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Rsjoomla Rsfiles\!
- Rsjoomla.com Rsfiles Extension For Joomla — versions 1.0-1.17.11
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@joomla.org (Product, product)
- security@joomla.org (Exploit, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-57827?
- CVE-2026-57827 is a critical-severity vulnerability in Rsjoomla Rsfiles\!, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-07-11.
- How severe is CVE-2026-57827?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-57827 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.