Joomla! CMS vulnerable to XSS via the input filter
Improper handling of input could lead to a cross-site scripting (XSS) vector in the checkAttribute method of the input filter framework class.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | joomla/filter | >= 4.0.0, < 4.0.1, >= 3.0.0, < 3.0.5, < 2.0.6 | 4.0.1, 3.0.5, 2.0.6 |
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
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-79- Platform
- Composer
- Package
joomla/filter- Disclosed
- 30.09.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-fm22-g2q9-j3pw - CC BY 4.0
Vulnerability history: joomla/filter
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 03.2022 09.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 1
- 2026: 0
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Joomla! CMS vulnerable to XSS via the input filter this entry
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