{"id":"GHSA-cgvr-f65r-pjv3","title":"Duplicate Advisory: Grav: Stored XSS via quoted-attribute bypass in detectXss","summary":"Duplicate Advisory: Grav: Stored XSS via quoted-attribute bypass in detectXss","severity":"medium","cvss":5.4,"cwe":["CWE-79"],"vendor":"getgrav","product":"getgrav/grav","ecosystem":"composer","affected":["getgrav/grav >= 1.5.2, <= 2.0.12"],"published":"2026-08-14","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:28:20Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-cgvr-f65r-pjv3","references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-269c-h76q-8cxw"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72832"},{"url":"https://github.com/getgrav/grav/commit/ad9709f865b09b68798fb1ac375b484a8cc1d892"},{"url":"https://www.vulncheck.com/advisories/grav-before-stored-xss-via-quoted-attribute-bypass"},{"url":"https://github.com/advisories/GHSA-cgvr-f65r-pjv3"}],"tags":["ghsa","composer"],"ingestedAt":"2026-09-17T18:25:16.053Z","slug":"GHSA-cgvr-f65r-pjv3","body":"## Overview\n\n### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-269c-h76q-8cxw. This link is maintained to preserve external references.\n\n### Original Description\nGrav 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 `<` and uses `[^>]*?`, 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 `<img src=x title=\">\" 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.\n\n## Affected packages\n\n- `getgrav/grav >= 1.5.2, <= 2.0.12`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}