CVE-2026-3986: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in codepeople Calculated Fields Form
The Calculated Fields Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the form settings in all versions up to, and including, 5.4.5.0. This is due to insufficient capability checks on the form settings save handler and insufficient input sanitization of the `fcontent` field in `fhtml` field types. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AI Analysis
Technical Summary
CVE-2026-3986 is a stored cross-site scripting vulnerability in the Calculated Fields Form WordPress plugin (versions up to 5.4.5.0). The issue stems from insufficient capability checks on the form settings save handler and improper sanitization of the 'fcontent' field within 'fhtml' field types. Authenticated attackers with Contributor-level permissions or higher can inject arbitrary scripts into pages, which execute upon page access. This vulnerability can lead to limited confidentiality and integrity impacts but does not affect availability.
Potential Impact
Successful exploitation allows an authenticated user with Contributor-level access or above to inject persistent malicious scripts into pages generated by the plugin. These scripts execute in the context of users viewing the affected pages, potentially leading to theft of user credentials, session tokens, or other sensitive information. The CVSS score of 6.4 reflects a medium severity with low complexity of attack, requiring authenticated access but no user interaction beyond page viewing. There is no reported impact on system availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Contributor-level access to trusted users only and consider disabling or removing the Calculated Fields Form plugin if possible. Monitor plugin updates closely and apply any official patches promptly once available.
CVE-2026-3986: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in codepeople Calculated Fields Form
Description
The Calculated Fields Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the form settings in all versions up to, and including, 5.4.5.0. This is due to insufficient capability checks on the form settings save handler and insufficient input sanitization of the `fcontent` field in `fhtml` field types. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-3986 is a stored cross-site scripting vulnerability in the Calculated Fields Form WordPress plugin (versions up to 5.4.5.0). The issue stems from insufficient capability checks on the form settings save handler and improper sanitization of the 'fcontent' field within 'fhtml' field types. Authenticated attackers with Contributor-level permissions or higher can inject arbitrary scripts into pages, which execute upon page access. This vulnerability can lead to limited confidentiality and integrity impacts but does not affect availability.
Potential Impact
Successful exploitation allows an authenticated user with Contributor-level access or above to inject persistent malicious scripts into pages generated by the plugin. These scripts execute in the context of users viewing the affected pages, potentially leading to theft of user credentials, session tokens, or other sensitive information. The CVSS score of 6.4 reflects a medium severity with low complexity of attack, requiring authenticated access but no user interaction beyond page viewing. There is no reported impact on system availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Contributor-level access to trusted users only and consider disabling or removing the Calculated Fields Form plugin if possible. Monitor plugin updates closely and apply any official patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-03-11T14:57:10.292Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69b3ceae2f860ef943b3113f
Added to database: 3/13/2026, 8:45:34 AM
Last enriched: 4/9/2026, 11:36:04 AM
Last updated: 4/27/2026, 12:10:56 AM
Views: 74
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