CyberRota Analysis
AI-GeneratedVersions of Grav from 1.5.2 to 2.0.12 are vulnerable to a stored cross-site scripting (XSS) flaw in the Security::detectXss() function, allowing unauthenticated users to execute arbitrary JavaScript by injecting malicious event handlers into page content. This vulnerability can be exploited by page editors lacking admin privileges, potentially compromising the integrity of the site for all visitors. Organizations using affected versions should prioritize patching to version 2.0.13 to mitigate the risk of XSS attacks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
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 `<` 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.