Critical
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-73373
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:15 UTC · Revision 1
Source evidence
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.
osv:CVE-2026-73373
Complete source record
{
"id": "9ded7a8bc102e7f73d208614e94b523695e6732ea393878261b7d2b6af158ca2",
"url": "https://osv.dev/vulnerability/CVE-2026-73373",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2026-73373",
"summary": "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.",
"evidence": "osv:CVE-2026-73373",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-73373",
"aliases": [
"BIT-joomla-2026-73373",
"CVE-2026-73373"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/joomla/joomla-cms",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "e08f97c45440266d7b51bcf1c0739e8f135bab0b"
},
{
"introduced": "0db7d502466ae41242ad761424f76378458fb819"
},
{
"fixed": "0f2d4de4729eb951e0878fec98c7990da07915b2"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:joomla:joomla\\!:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.0.0"
},
{
"fixed": "5.4.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:joomla:joomla\\!:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "6.0.0"
},
{
"fixed": "6.1.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"6.1.3-rc2",
"5.4.8-rc2",
"6.1.3-rc1",
"5.4.8-rc1",
"6.1.2",
"6.1.2-rc3",
"6.1.2-rc2",
"5.4.7",
"5.4.7-rc1",
"6.1.2-rc1",
"6.1.1",
"5.4.6",
"6.1.1-rc1",
"5.4.6-rc1",
"6.1.0",
"6.1.0-rc3",
"6.1.0-rc2",
"5.4.5",
"5.4.5-rc1",
"6.1.0-rc1",
"5.4.4",
"6.1.0-beta3",
"6.1.0-beta2",
"6.1.0-beta1",
"5.4.3",
"5.4.3-rc1",
"6.1.0-alpha3",
"6.1.0-alpha2",
"5.4.2",
"5.4.2-rc1",
"6.1.0-alpha1",
"5.4.1",
"5.4.1-rc2",
"5.4.1-rc1",
"5.4.0",
"5.4.0-rc1",
"5.4.0-beta3",
"5.4.0-beta2",
"6.0.0-beta1",
"5.4.0-beta1",
"6.0.0-alpha3",
"5.4.0-alpha3",
"6.0.0-alpha2",
"5.4.0-alpha2",
"6.0.0-alpha1",
"5.4.0-alpha1",
"5.3.0-alpha3",
"5.3.0-alpha2",
"5.3.0-alpha1",
"5.2.0-beta1",
"5.2.0-alpha3",
"5.2.0-alpha1",
"5.1.0-alpha4",
"5.1.0-alpha3",
"5.1.0-alpha2",
"5.1.0-alpha1",
"5.0.0-rc",
"5.0.0-beta3",
"5.0.0-beta2",
"5.0.0-beta1",
"5.0.0-alpha4",
"5.0.0-alpha3",
"5.0.0-alpha2",
"5.0.0-alpha1",
"4.2.0-rc1",
"4.2.0-beta3",
"psr12final",
"psr12anchor",
"4.2.0-beta2",
"4.2.0-beta1",
"4.2.0-alpha3",
"cypress-io",
"cypress",
"4.2.0-alpha2",
"4.2.0-alpha1",
"4.1.0-rc1",
"4.1.0-beta3",
"4.1.0-beta2",
"4.1.0-beta1",
"4.1.0-alpha3",
"4.1.0-alpha2",
"4.1.0-alpha1",
"4.0.0-beta3",
"4.0.0-beta2",
"4.0.0-beta",
"4.0.0-alpha12",
"4.0.0-alpha11",
"4.0.0-alpha10",
"4.0.0-alpha9",
"4.0.0-alpha8",
"4.0.0-alpha7",
"4.0.0-alpha6",
"4.0.0-alpha5",
"4.0.0-alpha4",
"4.0.0-alpha2",
"4.0.0-alpha1",
"3.5.0-beta2",
"3.4.5",
"3.5.0-beta",
"3.4.4",
"3.4.4-rc2",
"3.4.4-rc",
"3.4.3",
"3.4.2",
"3.4.2-rc",
"3.4.1",
"3.4.1-rc2",
"3.4.1-rc",
"3.4.0",
"3.4.0-rc",
"3.4.0-beta3",
"3.4.0-beta2",
"3.4.0-beta1",
"3.2.4",
"3.3.0",
"3.2.3",
"3.2.2",
"3.2.1",
"3.2.0",
"3.1.5",
"3.2.0.rc",
"3.2.0.beta",
"3.2.0.alpha",
"3.1.1",
"3.0.3",
"3.1.0_beta5",
"3.1.0_beta4",
"3.1.0_beta3",
"3.1.0_beta2",
"3.1.0_beta1",
"3.0.1",
"3.0.0",
"3.0.0_beta1",
"3.0.0_alpha-2",
"3.0.0_alpha-1",
"2.5.6",
"2.5.5",
"2.5.4",
"2.5.1",
"2.5.0",
"2.5.0_beta2",
"2.5.0_beta1",
"1.7.3"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73373.json"
}
}
],
"modified": "2026-10-24T10:30:26.132598816Z",
"provider": "osv",
"references": [
"https://www.joomla.org/",
"https://developer.joomla.org/security-centre/1077-20260810-core-unrestricted-uploads-of-shtml-files.html"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2026-73373",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 431542,
"published_at": "2026-08-18T16:18:17.173+00:00"
}