CVE-2026-85642 Formidable Forms CVE debrief

Who should care

Defenders responsible for WordPress installations with the Formidable Forms plugin should assess exposure and prioritize updates to prevent potential denial-of-service attacks. This includes reviewing system logs for suspicious activity, verifying the affected version of Formidable Forms, and applying updates as needed. Additionally, security teams should monitor payment gateway verification requests for potential exploitation attempts and track exceptions

Why it matters

Defenders should prioritize verifying the affected version of Formidable Forms and applying updates to prevent potential denial-of-service attacks against payment gateway verification requests.

• Potential denial-of-service attacks against payment gateway verification requests
• Consumption of daily allowance for payment gateway verification requests
• Refusal of legitimate verification attempts for 24 hours

Technical summary

The Formidable Forms WordPress plugin before 7.0 does not verify the identity of the caller before recording the timestamp it uses to rate limit payment gateway verification requests. This allows unauthenticated attackers to consume the daily allowance and cause legitimate verification attempts to be refused for the next 24 hours. The vulnerability affects Formidable Forms versions 6.5 to 6.35 and can be exploited by unauthenticated attackers. Defenders should prioritize verifying the affected version of Formidable Forms and applying updates to prevent potential denial-of-service attacks.

Defensive priority

Defenders should prioritize verifying the affected version of Formidable Forms and applying the necessary updates to prevent potential denial-of-service attacks.

Recommended defensive actions

• Verify the version of Formidable Forms is 7.0 or later
• Apply updates to prevent potential denial-of-service attacks
• Monitor payment gateway verification requests for suspicious activity
• Review system logs for potential exploitation attempts
• Assess exposure of affected Formidable Forms installations
• Prioritize updates for high-risk systems
• Track exceptions and retest remediated assets

Evidence notes

The CVE record and source item provide limited information about the vulnerability, including its description and affected versions. The source item notes that the vulnerability affects Formidable Forms versions 6.5 to 6.35. However, the exact scope of affected systems and potential impact on business operations is not explicitly stated. Defenders should verify the affected version of Formidable Forms and review system logs for suspicious activity.

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.