CVE-2026-42845

The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0 , there is an unauthenticated page-content overwrite via file upload GHSA-w4rc-p66m-x6qq. Public form uploads now strip path components from the POST-supplied filename and hard-block page-content extensions md, yaml...

CVE-2026-42842

The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0, a Stored Cross-Site Scripting XSS vulnerability exists in the Grav CMS Form plugin's select field template. Taxonomy tag and category values are rendered with the Twig |raw filter in the admin panel, bypassing the...

CVE-2026-42845 Grav: Anonymous Page Content Overwrite via Form File Upload filename Override

The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0 , there is an unauthenticated page-content overwrite via file upload GHSA-w4rc-p66m-x6qq. Public form uploads now strip path components from the POST-supplied filename and hard-block page-content extensions md, yaml...

CVE-2026-42845

The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0 , there is an unauthenticated page-content overwrite via file upload GHSA-w4rc-p66m-x6qq. Public form uploads now strip path components from the POST-supplied filename and hard-block page-content extensions md, yaml...

CVE-2026-42845 Grav: Anonymous Page Content Overwrite via Form File Upload filename Override

The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0 , there is an unauthenticated page-content overwrite via file upload GHSA-w4rc-p66m-x6qq. Public form uploads now strip path components from the POST-supplied filename and hard-block page-content extensions md, yaml...

CVE-2026-42845

CVE-2026-42845 describes an unauthenticated page-content overwrite in Grav’s Form plugin prior to version 9.1.0. An attacker could upload a form file with a crafted filename (e.g., form.md) and, due to the destination handling, overwrite the target page’s Markdown content, potentially enabling pr...

CVE-2026-42842 grav-plugin-form: XSS via Taxonomy Field Values in Admin Panel

The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0, a Stored Cross-Site Scripting XSS vulnerability exists in the Grav CMS Form plugin's select field template. Taxonomy tag and category values are rendered with the Twig |raw filter in the admin panel, bypassing the...

CVE-2026-42842 grav-plugin-form: XSS via Taxonomy Field Values in Admin Panel

The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0, a Stored Cross-Site Scripting XSS vulnerability exists in the Grav CMS Form plugin's select field template. Taxonomy tag and category values are rendered with the Twig |raw filter in the admin panel, bypassing the...

Grav Form Plugin has an Anonymous Page Content Overwrite via Form File Upload filename Override

Summary Tested on Form 9.0.3 released on April, 28th The Form plugin's file upload handler at user/plugins/form/classes/Form.php:583 accepts a POST-supplied filename parameter $filename = $post'filename' ?? $upload'file''name' that overrides the original uploaded filename. The override passes...

GHSA-W4RC-P66M-X6QQ Grav Form Plugin has an Anonymous Page Content Overwrite via Form File Upload filename Override

Summary Tested on Form 9.0.3 released on April, 28th The Form plugin's file upload handler at user/plugins/form/classes/Form.php:583 accepts a POST-supplied filename parameter $filename = $post'filename' ?? $upload'file''name' that overrides the original uploaded filename. The override passes...

PT-2026-37281

Name of the Vulnerable Software and Affected Versions Grav CMS Form plugin versions prior to 9.1.0 Description A Stored Cross-Site Scripting XSS issue exists in the select field template of the Grav CMS Form plugin. Taxonomy tag and category values are rendered using the Twig |raw filter in the...