Joomla! Framework - [20260519] - Inadequate content filtering within the checkAttribute filter code.

Inadequate content filtering within the checkAttribute methods leads to XSS vulnerabilities in various components.

Problem type

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected products

Joomla! Project

Joomla! Framework Filter package

1.0.0-3.0.5 - AFFECTED

4.0.0-4.0.1 - AFFECTED

References

developer.joomla.org

https://developer.joomla.org/security-centre/1051-20260519-framework-inadequate-content-filtering-within-the-checkattribute-filter-code.html

vendor-advisory

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-48903

Click to expand

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    "assignerOrgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586",
    "assignerShortName": "Joomla",
    "dateUpdated": "2026-05-26T16:46:05.152Z",
    "dateReserved": "2026-05-26T10:06:17.656Z",
    "datePublished": "2026-05-26T16:46:05.152Z",
    "state": "PUBLISHED"
  },
  "containers": {
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        "shortName": "Joomla",
        "dateUpdated": "2026-05-26T16:46:05.152Z"
      },
      "title": "Joomla! Framework - [20260519] - Inadequate content filtering within the checkAttribute filter code.",
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      "affected": [
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