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

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-2026-42845 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...

PT-2026-38283

Name of the Vulnerable Software and Affected Versions Grav form plugin versions prior to 9.1.0 Description An unauthenticated page-content overwrite exists via file upload. The file upload handler in user/plugins/form/classes/Form.php uses a filename parameter that can be controlled via POST...