GetGrav up to 2.0.11 Security Security.php Security::detectXss cross site scripting

Summaryinfo

A vulnerability was found in GetGrav Grav. It has been rated as problematic. Affected by this vulnerability is the function Security::detectXss of the file system/src/Grav/Common/Security.php of the component Security. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2026-72832. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in GetGrav Grav. It has been rated as problematic. This issue affects the function Security::detectXss of the file system/src/Grav/Common/Security.php of the component Security. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-72832 since 08/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

By approaching the search of inurl:system/src/Grav/Common/Security.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.0.13 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• GetGrav

Name

• Grav

Version

• 1.0.0-beta.15
• 1.0.0-beta.17
• 1.0.0-rc.16
• 1.0.3
• 1.0.4
• 1.0.6
• 1.0.10
• 1.0.13
• 1.2.0
• 1.4.0
• 1.4.3
• 1.7.28
• 1.7.53
• 1.10.49.5
• 1.10.53
• 2.0.0
• 2.0.0-beta.2
• 2.0.0-rc.2
• 2.0.0-rc.8
• 2.0.1
• 2.0.2
• 2.0.4
• 2.0.7
• 2.0.9
• 2.0.11

Website

• Product: https://github.com/getgrav/grav/

CPE 2.3info

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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