Multiple cross-site scripting (XSS) vulnerabilities in the Webform Drupal module 5.x before 5.x-1.10, 5.x-2.x before 5.x-2.0-beta3, and 6.x before 6.x-1.0-beta3 allow remote attackers to inject arbitrary web script or HTML via unspecified vectors.

XSS vulnerability when rendering filename in Webform Multiform

Webform Multiple File Upload module for Drupal 7.x contains a cross-site scripting (XSS) vulnerability in the file name renderer. An unauthenticated attacker can exploit this vulnerability by uploading a file with a malicious filename containing JavaScript code (e.g., "<img src=1 onerror=alert(document.domain)>") to a Webform node with a Multifile field where file type validation is disabled. This allows the execution of arbitrary scripts in the context of the victim's browser. The issue is present in a third-party library and has been addressed in a patch available at  https://github.com/fyneworks/multifile/pull/44 . Users are advised to apply the provided patch or update to a fixed version of the module.