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Vulnerability record · CVE-2026-6939 · published 11 July 2026

CVE-2026-6939: Cross-site scripting vulnerability

The CorvusPay WooCommerce Payment Gateway plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'approval_code' parameter in all versions up to, and including, 2.7.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The unauthenticated REST endpoint POST /wp-json/corvuspay/success/ is registered with permission_callback set to __return_true, and although a signature validation step exists it only logs the result without halting execution, meaning an attacker can supply a completely arbitrary signature and have a malicious approval_code stored in the database unchallenged.

7.2 CVSS 3.1 High EPSS 0.56% · top 55.5% CWE-79 · Cross-site scripting Deferred
7.2CVSS 3.1 base score
0.56%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
11References
13 Jul 2026Last modified by NVD

Description

The CorvusPay WooCommerce Payment Gateway plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'approval_code' parameter in all versions up to, and including, 2.7.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The unauthenticated REST endpoint POST /wp-json/corvuspay/success/ is registered with permission_callback set to __return_true, and although a signature validation step exists it only logs the result without halting execution, meaning an attacker can supply a completely arbitrary signature and have a malicious approval_code stored in the database unchallenged.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

LinkTags
https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.2/includes/class-wc-gateway-corvus
https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.2/includes/class-wc-gateway-corvus
https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.2/includes/class-wc-order-corvuspa
https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.3/includes/class-wc-gateway-corvus
https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.3/includes/class-wc-gateway-corvus
https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.3/includes/class-wc-order-corvuspa
https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/trunk/includes/class-wc-gateway-corvuspay.p
https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/trunk/includes/class-wc-gateway-corvuspay.p
https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/trunk/includes/class-wc-order-corvuspay.php
https://plugins.trac.wordpress.org/changeset?reponame=&old=3576949%40corvuspay-woocommerce-integration&new=3576949%40cor
https://www.wordfence.com/threat-intel/vulnerabilities/id/d8a81c01-495f-4861-b66f-000072e99512?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-6939), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.