CVE-2026-8891
Stored Cross-Site Scripting in BitForm WordPress Plugin
Publication date: 2026-05-27
Last updated on: 2026-05-27
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| bitform | bitform | to 1.1.0 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| 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. |
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability impact me? :
This vulnerability allows attackers with contributor-level access to inject arbitrary scripts into pages, which can lead to the execution of malicious code in the browsers of users who visit those pages. This can result in theft of sensitive information, session hijacking, defacement of the website, or distribution of malware.
Can you explain this vulnerability to me?
The BitForm plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in its 'bitform' shortcode up to version 1.1.0. This occurs because the plugin does not properly sanitize or escape user-supplied attributes 'width' and 'height' that are used directly in the style attribute of an iframe element. As a result, authenticated users with contributor-level access or higher can inject malicious scripts that execute whenever someone views the affected page.