Vulnerability · Published Jul 21, 2026 · Assigned by VulnCheck

CVE-2026-65052Ninja Forms Calculation and Payment Total Tampering via Fail-Open get_calc_value in ListSelect and ListRadio Fields

High 7.5

In plain English

A high-severity security flaw in Ninja Forms from Saturday Drive. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 52.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Saturday Drive	Ninja Forms	0 – before 3.14.9

Weakness: CWE-472 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Product product
Vendor Changelog patch
https://www.vulncheck.com/advisories/ninja-forms-calculation-and-payment-total-tampering-via-fail-open-get-calc-value-in-listselect-and-listradio-fields third-party-advisory