Getgrav Shortcode Core Plugin up to 6.2.1 Attribute ColorShortcode.php Security::detectXss cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in Getgrav Shortcode Core Plugin up to 6.2.1. Impacted is the function Security::detectXss of the file ColorShortcode.php of the component Attribute Handler. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2026-64851. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Getgrav Shortcode Core Plugin up to 6.2.1. It has been classified as problematic. This affects the function Security::detectXss of the file ColorShortcode.php of the component Attribute Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE is:

Grav Shortcode Core Plugin allows for the development shortcode plugins that utilize the common format utilized by WordPress and BBCode. Prior to 6.2.2, Grav Shortcode Core passes shortcode syntax through Security::detectXss() because it contains no literal less-than character, then ColorShortcode.php and related attribute handlers concatenate an attacker-controlled parameter into HTML without encoding. An account with admin.pages permission can close the generated attribute and add an event handler, creating stored cross-site scripting that executes for visitors or administrators who view the page. This issue is fixed in version 6.2.2.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-64851 since 07/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are needed for 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:ColorShortcode.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 6.2.2 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

• Shortcode Core Plugin

Version

• 6.2.0
• 6.2.1

CPE 2.3info

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• 🔒

CPE 2.2info

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• 🔒

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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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