CVE-2026-90913
HighCVSS 7.0Summary
Joomla! Core versions 4.0.0-5.4.8 and 6.0.0-6.1.3 have improper ACL checks for access level webservice endpoints. An improper access check allows unauthorized users to perform mutation actions in access level endpoints.
Risk Assessment
Unauthorized users can modify access levels, potentially leading to privilege escalation and data confidentiality breach.
Recommendation
Upgrade Joomla! to a patched version. Also review permission configuration for webservice endpoints.
Other vulnerabilities in Joomla!
See all- CVE-2026-92232High
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- CVE-2026-92231High
Joomla! Core versions 1.5.0-5.4.8 and 6.0.0-6.1.3 have an XSS filter bypass in InputFilter due to an HTML5 entity decode mismatch. The checkAttribute method normalizes an attribute value before testing it against the "javascript:" scheme regex, but without decoding HTML5 entities beforehand, causing an XSS vector.
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- CVE-2026-92225Medium
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Joomla! Core versions 4.0.0-5.4.8 and 6.0.0-6.1.3 have SSRF vectors in various core extensions. URLs used for serverside requests were improperly validated, leading to SSRF vectors.
- CVE-2026-90915High
Joomla! Core versions 4.0.0-5.4.8 and 6.0.0-6.1.3 have an arbitrary directory deletion vulnerability via the cache purge action. An improper validation of the cache group name allowed path traversals in the file storage of the caching layer, resulting in arbitrary directory deletions.
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SQL injection vulnerability in Joomla! 3.x before 3.4.7 allows attackers to execute arbitrary SQL commands via unspecified vectors.
Original NVD description (English source)
Joomla! Core - [20260903] - Core - Improper ACL checks for access level webservice endpoints in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - An improper access check allows unauthorized users to perform mutation actions in access level endpoints.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS