Joomla! Core - [20250901] Inadequate content filtering within the checkAttribute filter code
Priority LOW 22CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Improper handling of input could lead to an XSS vector in the checkAttribute method of the input filter framework class.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00314 24th percentileScored 2026-11-07
Fix Fixed joomla/filter (Packagist): 4.0.1, 3.0.5, 2.0.6
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Joomla! | Joomla! CMS | 3.0.0-3.10.20; 4.0.0-4.4.13; 5.0.0-5.3.3 | — | No fix listed | CNA |
| — | joomla/filter (Packagist) | 4.0.0 to before 4.0.1 | 4.0.1 | Patch available | GHSA-fm22-g2q9-j3pw |
| — | joomla/filter (Packagist) | 3.0.0 to before 3.0.5 | 3.0.5 | Patch available | GHSA-fm22-g2q9-j3pw |
| — | joomla/filter (Packagist) | before 2.0.6 | 2.0.6 | Patch available | GHSA-fm22-g2q9-j3pw |
- Joomla! CMS VendorJoomla! Affected 3.0.0-3.10.20; 4.0.0-4.4.13; 5.0.0-5.3.3 Fixed in — No fix listed CNA
- joomla/filter (Packagist) Vendor— Affected 4.0.0 to before 4.0.1 Fixed in 4.0.1 Patch available GHSA-fm22-g2q9-j3pw
- joomla/filter (Packagist) Vendor— Affected 3.0.0 to before 3.0.5 Fixed in 3.0.5 Patch available GHSA-fm22-g2q9-j3pw
- joomla/filter (Packagist) Vendor— Affected before 2.0.6 Fixed in 2.0.6 Patch available GHSA-fm22-g2q9-j3pw
Remediation
- Fix · GHSA-fm22-g2q9-j3pw joomla/filter (Packagist) Fixed in 4.0.1 Advisory →
- Fix · GHSA-fm22-g2q9-j3pw joomla/filter (Packagist) Fixed in 3.0.5 Advisory →
- Fix · GHSA-fm22-g2q9-j3pw joomla/filter (Packagist) Fixed in 2.0.6 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-54476
- 2026-10-03 Alias added: GHSA-fm22-g2q9-j3pw
References
Advisory 2
Other 4
- 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://github.com/joomla/joomla-cms
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Sources
- CVE-2025-54476 · CVE Program
- CVE-2025-54476 · NVD
- FIRST EPSS
- GHSA-fm22-g2q9-j3pw · GitHub Advisory Database · CC BY 4.0
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