CVE-2026-73373CWE-434unrestricted-file-upload

CVE-2026-73373

Critical · published August 18, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
50.4
In the wild
Unconfirmed
What it is

Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2 - The default list of dangerous files did not include SHTML files. On servers that executed these files, that could lead to code execution.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.9 · CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
0.00649 · 50.4th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-08-18T20:18Z
Affected products (2)
ProductVersionsFixed in
joomla/joomla\!≥ 1.0.0, < 5.4.85.4.8
joomla/joomla\!≥ 6.0.0, < 6.1.36.1.3
References (2)
https://developer.joomla.org/security-centre/1077-20260810-core-unrestricted-uploads-of-shtml-files.html · [email protected]https://www.joomla.org/ · [email protected]
EPSS history
Timeline
  • 18 AUG 16:03Z
    Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2
    cvelistv5