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Grav: Single invalid UTF-8 byte disables every rule in Security::detectXss(), bypassing the page-content XSS safety gate

🗓️ 17 Sep 2026 20:44:39Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 5 Views

Grav detectXss() bypass via invalid UTF-8 byte allows stored XSS with low privileges.

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17 Sep 2026 20:56Current
CVSS 45.1
CVSS 3.15.4
EPSS0.00182
5