CVE-2026-85642: CWE-400 Uncontrolled Resource Consumption in Formidable Forms
Description
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, allowing unauthenticated attackers to consume the daily allowance and cause legitimate verification attempts to be refused for the next 24 hours.
CVSS v3.1
Score 7.5high
Affected software
Formidable Forms
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85642 is an uncontrolled resource consumption vulnerability (CWE-400) in the Formidable Forms WordPress plugin prior to version 7.0. The plugin fails to authenticate callers before logging timestamps that enforce rate limits on payment gateway verification requests. As a result, unauthenticated attackers can exhaust the daily allowance, preventing legitimate users from performing verification attempts for a full day.
Potential Impact
Unauthenticated attackers can cause denial of service for legitimate payment gateway verification attempts by exhausting the daily rate limit allowance. This disrupts normal plugin functionality related to payment verification for up to 24 hours, potentially impacting website operations that rely on Formidable Forms for payment processing.
Mitigation Recommendations
Upgrade Formidable Forms to version 7.0 or later, where this vulnerability is fixed. No official patch link is provided, but the affected versions are explicitly stated as prior to 7.0. Until upgrading, be aware of the risk of denial of service via rate limit exhaustion.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-09-04T12:30:26.224Z
- State
- PUBLISHED
Threat ID: 6ad855df2cdf04f656afec36
Added to database: 10/21/2026, 06:04:15 UTC
Last enriched: 10/21/2026, 06:19:09 UTC
Last updated: 10/21/2026, 13:40:20 UTC
Views: 9
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