codepeople CP Contact Form with PayPal Plugin up to 1.3.56 on WordPress Query Parameter cp_contactformpp_ipncheck authorization

Summaryinfo

A vulnerability was found in codepeople CP Contact Form with PayPal Plugin up to 1.3.56 on WordPress. It has been classified as critical. This affects an unknown function of the component Query Parameter Handler. The manipulation of the argument cp_contactformpp_ipncheck leads to authorization. This vulnerability is referenced as CVE-2025-13384. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in codepeople CP Contact Form with PayPal Plugin up to 1.3.56 on WordPress and classified as critical. This issue affects an unknown code block of the component Query Parameter Handler. The manipulation of the argument cp_contactformpp_ipncheck with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is integrity, and availability. The summary by CVE is:

The CP Contact Form with PayPal plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.3.56. This is due to the plugin exposing an unauthenticated IPN-like endpoint (via the 'cp_contactformpp_ipncheck' query parameter) that processes payment confirmations without any authentication, nonce verification, or PayPal IPN signature validation. This makes it possible for unauthenticated attackers to mark form submissions as paid without making actual payments by sending forged payment notification requests with arbitrary POST data (payment_status, txn_id, payer_email).

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2025-13384. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/22/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-198536). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• codepeople

Name

• CP Contact Form with PayPal Plugin

Version

• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3
• 1.3.4
• 1.3.5
• 1.3.6
• 1.3.7
• 1.3.8
• 1.3.9
• 1.3.10
• 1.3.11
• 1.3.12
• 1.3.13
• 1.3.14
• 1.3.15
• 1.3.16
• 1.3.17
• 1.3.18
• 1.3.19
• 1.3.20
• 1.3.21
• 1.3.22
• 1.3.23
• 1.3.24
• 1.3.25
• 1.3.26
• 1.3.27
• 1.3.28
• 1.3.29
• 1.3.30
• 1.3.31
• 1.3.32
• 1.3.33
• 1.3.34
• 1.3.35
• 1.3.36
• 1.3.37
• 1.3.38
• 1.3.39
• 1.3.40
• 1.3.41
• 1.3.42
• 1.3.43
• 1.3.44
• 1.3.45
• 1.3.46
• 1.3.47
• 1.3.48
• 1.3.49
• 1.3.50
• 1.3.51
• 1.3.52
• 1.3.53
• 1.3.54
• 1.3.55
• 1.3.56

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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