CVE-2026-110383 WP E-Signature CVE debrief

Who should care

Defenders responsible for the security of Electronic Signature Add-on for Fluent Forms installations should assess exposure and prioritize remediation. This includes reviewing the add-on's configuration, verifying the effectiveness of compensating controls, and monitoring for potential exploitation attempts. Additionally, defenders should consider the potential impact on affected systems and take steps to mitigate the vulnerability.

Why it matters

CVE-2026-110383 is an Authorization Bypass Through User-Controlled Key vulnerability in the Electronic Signature Add-on for Fluent Forms, affecting versions from n/a through 2.0.5. Defenders should assess exposure, prioritize remediation, and verify the effectiveness of compensating controls.

• Defenders must assess exposure of affected systems to prioritize remediation
• Verification of compensating controls is necessary to ensure effectiveness
• Monitoring for potential exploitation attempts is required to detect potential attacks

Technical summary

The Electronic Signature Add-on for Fluent Forms is vulnerable to an Authorization Bypass Through User-Controlled Key issue, affecting versions from n/a through 2.0.5. This vulnerability allows attackers to bypass authorization due to incorrectly configured access control security levels. The issue arises from the add-on's improper handling of user-controlled keys, which can be exploited to bypass authorization mechanisms. Defenders should assess exposure, prioritize remediation, and verify the effectiveness of compensating controls.

Defensive priority

Defenders should prioritize remediation of affected systems, verify the effectiveness of compensating controls, and monitor for potential exploitation attempts.

Recommended defensive actions

• Assess exposure of affected Electronic Signature Add-on for Fluent Forms installations
• Prioritize remediation of affected systems
• Verify the effectiveness of compensating controls
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation is required to determine the full scope of affected systems and potential exploitation. The Electronic Signature Add-on for Fluent Forms is vulnerable to an Authorization Bypass Through User-Controlled Key issue, affecting versions from n/a through 2.0.5. This vulnerability allows attackers to bypass authorization due to incorrectly configured access control security levels. Defenders should verify the effectiveness of compensating

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.