Paper/Archive/CVE-2026-73373

CVE-2026-73373

Joomla! Project Joomla! CMS — Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2

EPSS 0.6%CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (NVD)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 51.0.510 × 2010.2 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Joomla! CMS1.0.0-5.4.6–CNA

Joomla! CMS6.0.0-6.1.2–CNA

Joomla! Framework Filesystem package1.0.0-3.3.0–CNA

Joomla! Framework Filesystem package4.0.0-4.2.0–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Joomla (CNA)8.9CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refjoomla.org advisorydeveloper.joomla.org/security-centre/1077-20260810-core-unrestricted-uploads-of-shtml-files.html