---
id: GHSA-9pr6-8r9w-wvmj
title: >-
  Duplicate Advisory: Grav: detectXss() misses an event-handler attribute after
  an unpaired quote in an unquoted attribute value, giving stored XSS
summary: >-
  Duplicate Advisory: Grav: detectXss() misses an event-handler attribute after
  an unpaired quote in an unquoted attribute value, giving stored XSS
severity: critical
cvss: 8.7
cwe:
  - CWE-79
vendor: getgrav
product: getgrav/grav
ecosystem: composer
affected:
  - getgrav/grav < 2.0.15
published: '2026-08-18'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T20:56:28Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-9pr6-8r9w-wvmj'
references:
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-vfmf-q6x9-cw96'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75828'
  - url: >-
      https://www.vulncheck.com/advisories/grav-before-stored-xss-via-detectxss-quote-bypass
  - url: 'https://github.com/advisories/GHSA-9pr6-8r9w-wvmj'
tags:
  - ghsa
  - composer
ingestedAt: '2026-09-17T21:29:16.994Z'
---

## Overview

### Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-vfmf-q6x9-cw96. This link is maintained to preserve external references.

### Original 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.

## Affected packages

- `getgrav/grav < 2.0.15`

## Remediation

Refer to the advisory for the patched release.