CVE-2026-72832

Grav versions from 1.5.2 through 2.0.12 contain a stored cross-site scripting vulnerability in the Security::detectXss() function (system/src/Grav/Common/Security.php). The event-handler scan is anchored at ` ]*?`, which cannot cross the first literal `>`; when a `>` appears inside a quoted attribute value the browser keeps the tag open and parses a subsequent event handler (e.g. onerror), so the detector and browser disagree. A page editor without admin.super privileges can save page content such as ` " onerror=alert(document.domain)>`, which is accepted, stored, and executed in the site origin when any visitor (including unauthenticated users) views the page. Fixed in 2.0.13.

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Publisher and database URLs for this record (shown for attribution; reading stays in Bugflare).

• https://github.com/getgrav/grav/commit/ad9709f865b09b68798fb1ac375b484a8cc1d892
• https://github.com/getgrav/grav/security/advisories/GHSA-269c-h76q-8cxw
• https://www.vulncheck.com/advisories/grav-before-stored-xss-via-quoted-attribute-bypass