CVE-2026-110378 WP E-Signature CVE debrief

Who should care

Defenders responsible for WordPress installations with the Ninja Forms Signature Contract Add-On plugin should assess their exposure and verify the plugin version. They should also review access control configurations and monitor for unusual activity.

Why it matters

CVE-2026-110378 is a MEDIUM severity vulnerability in the WordPress Ninja Forms Signature Contract Add-On plugin, requiring verification of plugin versions and access control configurations to prevent potential unauthorized access.

• Verification of plugin version and access control configurations is necessary.
• Potential for unauthorized access due to missing authorization.
• Need for monitoring unusual activity related to the plugin.

Technical summary

The Ninja Forms Signature Contract Add-On plugin for WordPress, versions up to and including 3.2.5, is vulnerable to a Broken Access Control issue due to missing authorization. This allows for Exploiting Incorrectly Configured Access Control Security Levels, potentially leading to unauthorized access. The CVSS score for this vulnerability is 5.3, with a severity rating of MEDIUM. Defenders should prioritize verifying the plugin version and ensuring it is updated beyond 3.2.5 if possible, review access control configurations, and monitor for unusual activity. The vulnerability's impact is primarily related to the potential for unauthorized access due to the missing authorization mechanism.

Defensive priority

Defenders should prioritize verifying the version of the Ninja Forms Signature Contract Add-On plugin and ensuring it is updated to a version beyond 3.2.5 if possible. They should also review access control configurations for the plugin.

Recommended defensive actions

• Verify the version of the Ninja Forms Signature Contract Add-On plugin and update if necessary.
• Review access control configurations for the plugin.
• Monitor for any unusual activity related to the plugin.
• Perform a thorough review of the plugin's access control settings to ensure they are properly configured.
• Check for any existing compensating controls that may mitigate the vulnerability.
• Inventory all assets that use the Ninja Forms Signature Contract Add-On plugin to prioritize remediation.
• Track the status of remediation efforts and retest remediated assets to ensure the vulnerability is fully resolved.

Evidence notes

The CVE record and source item provide details on the vulnerability, including its classification, affected versions, and CVSS score. However, specific details about exploitation or impact are not provided, suggesting a need for further verification.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.