Joomla! CMS vulnerable to XSS via the input filter
The advisory, in context
Improper handling of input could lead to a cross-site scripting (XSS) vector in the checkAttribute method of the input filter framework class.
Affected packages
Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.
From 4.0.0 before 4.0.1
Fixed in 4.0.1
1 explicitly affected versions
4.0.0
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.0.0"
]
}From 3.0.0 before 3.0.5
Fixed in 3.0.5
5 explicitly affected versions
3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.0.5"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.0.0",
"3.0.1",
"3.0.2",
"3.0.3",
"3.0.4"
]
}Earlier releases before 2.0.6
Fixed in 2.0.6
39 explicitly affected versions
1.0, 1.0-alpha, 1.0-beta, 1.0-beta2, 1.0-beta3, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.1.6, 1.2.0, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.5, 1.4.0, 1.4.1, 1.4.2, 1.4.3, 1.4.4, 1.4.5, 1.4.6, 1.4.7, 2.0.0, 2.0.0-beta, 2.0.0-beta2, 2.0.0-beta3, 2.0.0-beta4, 2.0.0-beta5, 2.0.0-rc, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.6"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0",
"1.0-alpha",
"1.0-beta",
"1.0-beta2",
"1.0-beta3",
"1.1.0",
"1.1.1",
"1.1.2",
"1.1.3",
"1.1.4",
"1.1.5",
"1.1.6",
"1.2.0",
"1.3.0",
"1.3.1",
"1.3.2",
"1.3.3",
"1.3.4",
"1.3.5",
"1.4.0",
"1.4.1",
"1.4.2",
"1.4.3",
"1.4.4",
"1.4.5",
"1.4.6",
"1.4.7",
"2.0.0",
"2.0.0-beta",
"2.0.0-beta2",
"2.0.0-beta3",
"2.0.0-beta4",
"2.0.0-beta5",
"2.0.0-rc",
"2.0.1",
"2.0.2",
"2.0.3",
"2.0.4",
"2.0.5"
]
}References
- https://nvd.nist.gov/vuln/detail/CVE-2025-54476
- https://github.com/joomla-framework/filter/commit/188dd3fccd6fa0532d105a52736affdf6b166217
- https://github.com/joomla-framework/filter/commit/852c7e101c649500d3af58ffb8baf15d7c86d825
- https://github.com/joomla-framework/filter/commit/fcde280785f188e93530f7da68102f7dd8f9f723
- https://developer.joomla.org/security-centre/1010-20250901-core-inadequate-content-filtering-within-the-checkattribute-filter-code.html
- https://github.com/joomla/joomla-cms