jconti Payment Gateway for Redsys & WooCommerce Lite Plugin successful_request signature verification

Summaryinfo

A vulnerability was found in jconti Payment Gateway for Redsys & WooCommerce Lite Plugin up to 7.0.0 on WordPress and classified as critical. Affected by this issue is the function successful_request. Executing a manipulation can lead to signature verification. This vulnerability is handled as CVE-2026-5050. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in jconti Payment Gateway for Redsys & WooCommerce Lite Plugin up to 7.0.0 on WordPress. This vulnerability affects the function successful_request. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The Payment Gateway for Redsys & WooCommerce Lite plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 7.0.0 due to successful_request() handlers calculating a local signature but not validating Ds_Signature from the request before accepting payment status across the Redsys, Bizum, and Google Pay gateway flows. This makes it possible for unauthenticated attackers to forge payment callback data and mark pending orders as paid when they know a valid order key and order amount, potentially allowing checkout completion and product or service fulfillment without a successful payment.

The weakness was released by Nguyen Ngoc Duc. The advisory is available at wordfence.com. This vulnerability was named CVE-2026-5050 since 03/27/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/16/2026).

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

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Productinfo

Type

• E-Commerce Management Software

Vendor

• jconti

Name

• Payment Gateway for Redsys & WooCommerce Lite Plugin

Version

• 7.0

CPE 2.3info

• 🔒

CPE 2.2info

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