Executive brief
BitForm is a WordPress plugin used to create and manage forms on websites. A security flaw allows users with contributor-level access or higher to inject malicious scripts into pages via form shortcodes. When other users or administrators visit these pages, the scripts execute automatically, which could lead to unauthorized actions or data theft.
Technical details
The BitForm plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping in the Shortcode::shortcode() function. Specifically, user-supplied attributes such as 'width' and 'height' within the 'bitform' shortcode are interpolated directly into the 'style' attribute of an <iframe> element. An authenticated attacker with contributor-level permissions or higher can exploit this to inject arbitrary web scripts. These scripts are stored on the server and execute in the context of any user's browser who views the affected page. The vulnerability exists in all versions up to and including 1.1.0.
Affected products
- Bit Apps BitForm Up to, and including, 1.1.0
Timeline
- 2026-05-27: disclosed: Initial publication of the CVE record.
- 2026-05-27: advisory: Wordfence published the vulnerability details.
References
- https://plugins.trac.wordpress.org/browser/bitform/tags/1.1.0/Common/Shortcode.php
- https://plugins.trac.wordpress.org/browser/bitform/tags/1.1.0/Common/Shortcode.php
- https://plugins.trac.wordpress.org/browser/bitform/tags/1.1.0/index.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/71167dec-38ec-4eb3-8fab-25eca0f8b071?source=cve