CVE-2026-75828

CVSS 9.3 (critical) · published 2026-08-18

Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the detectXss() function where unpaired quotes in unquoted attribute values bypass event-handler detection. Authenticated editors can inject event handlers like onerror= that pass validation and execute in visitor browsers when page content is rendered.

Weakness: CWE-79

Source: NVD CVE-2026-75828

References

• https://github.com/getgrav/grav/security/advisories/GHSA-vfmf-q6x9-cw96
• https://www.vulncheck.com/advisories/grav-before-stored-xss-via-detectxss-quote-bypass
• https://github.com/getgrav/grav/security/advisories/GHSA-vfmf-q6x9-cw96

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