CVE-2026-3986
Stored XSS in WordPress Calculated Fields Form Plugin Allows Script Injection
Publication date: 2026-03-13
Last updated on: 2026-03-13
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| calculated_fields_form | calculated_fields_form | to 5.4.5.0 (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
Can you explain this vulnerability to me?
The Calculated Fields Form plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in all versions up to and including 5.4.5.0. This vulnerability arises because the plugin does not properly check user capabilities when saving form settings and fails to sufficiently sanitize input in the 'fcontent' field within 'fhtml' field types. As a result, authenticated users with Contributor-level access or higher can inject malicious scripts into pages, which will execute whenever those pages are accessed.
How can this vulnerability impact me? :
This vulnerability can allow attackers with Contributor-level access or above to inject arbitrary web scripts into pages. These scripts execute when users visit the affected pages, potentially leading to theft of user credentials, session hijacking, defacement, or distribution of malware. Because the vulnerability involves stored scripts, the impact can affect multiple users repeatedly.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know