CVE-2026-75828

High

Description

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.

SeverityHigh

CVSS8.7

Exploit probability—

ProductGetgrav/grav

PublishedAug 18, 2026

First seenAug 18, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

getgrav/grav2.0.15 or later

Vendor advisories

github.com/getgrav/grav/security/advisories/GHSA-vfmf-q6x9-cw96

Affected products

Product	Affected versions	Fixed in
getgrav/gravPackagist	v < 2.0.15	2.0.15

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.