Medium severity · published May 5, 2026
CVE-2026-2729
Forminator – Contact Form, Payment Form & Custom Form Builder <= 1.52.0 - Missing Authorization to Unauthenticated Stripe PaymentIntent Reuse / Underpayment Bypass via 'paymentid' Parameter
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
The Forminator plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.52.0. This is due to the plugin not properly verifying that a user is authorized to perform an action when processing attacker-supplied Stripe PaymentIntent identifiers in the public payment flow. This makes it possible for unauthenticated attackers to submit high-value paid forms as completed by reusing a previously succeeded low-value Stripe PaymentIntent, resulting in underpayment/payment bypass conditions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FF
Forminator Forms – Contact Form, Payment Form & Custom Form Builder · wpmudev
through 1.52.0 · source: vendor
Affected product
FF
Forminator Forms – Contact Form, Payment Form & Custom Form Builder
wpmudev
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2729
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2729
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3500669/forminator
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/1afb94ab-b3ba-4598-8ff4-f9ffc6717371?source=cve
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