PatchSiren cyber security CVE debrief
CVE-2026-65052 Saturday Drive CVE debrief
The Ninja Forms WordPress plugin version 3.14.8 and prior contains an improper input validation vulnerability, allowing unauthenticated attackers to inject arbitrary numeric values into form calculations and payment totals. This vulnerability can be exploited by tampering with form submission payloads to the ajax submit endpoint, causing the get_calc_value() method to fail open and return attacker-controlled values. As a result, attackers can manipulate payment amounts to zero or arbitrary figures, bypassing admin-configured pricing logic. Users of the Ninja Forms WordPress plugin version 3.14.8 and prior should be aware of this vulnerability and take immediate action to protect their applications.
- Vendor
- Saturday Drive
- Product
- Ninja Forms
- CVSS
- HIGH 8.7
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-21
- Original CVE updated
- 2026-07-22
- Advisory published
- 2026-07-21
- Advisory updated
- 2026-07-22
Who should care
Users of the Ninja Forms WordPress plugin version 3.14.8 and prior should be aware of this vulnerability and take immediate action to protect their applications. This includes reviewing and validating user input to prevent arbitrary numeric value injection, implementing additional security measures to detect and prevent tampering with form submission payloads, and updating the plugin to a version that is not vulnerable. Affected operators, platforms, vulnerability-management, and security teams should prioritize this vulnerability due to its high severity and potential impact on payment processing.
Technical summary
The Ninja Forms WordPress plugin version 3.14.8 and prior contains an improper input validation vulnerability that allows unauthenticated attackers to inject arbitrary numeric values into form calculations and payment totals by submitting values that do not match any configured option in ListSelect or ListRadio fields. Attackers can tamper with form submission payloads to the ajax submit endpoint, causing the get_calc_value() method to fail open and return attacker-controlled values, enabling manipulation of payment amounts to zero or arbitrary figures and bypassing admin-configured pricing logic.
Defensive priority
High
Recommended defensive actions
- Update the Ninja Forms WordPress plugin to a version that is not vulnerable
- Review and validate user input to prevent arbitrary numeric value injection
- Implement additional security measures to detect and prevent tampering with form submission payloads
- 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
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
Evidence notes
The CVE record was published on 2026-07-21T15:16:39.430Z and was last modified on 2026-07-22T15:17:22.303Z. The NVD entry is currently Deferred. The source details are limited, and further verification is needed to confirm affected scope and severity. Defenders should review the official CVE record and NVD entry for additional information.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-21T15:16:39.430Z and has not been modified since then. The NVD entry is currently Deferred.