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Vulnerability record · CVE-2026-19914 · published 1 September 2026

CVE-2026-19914: Cross-site scripting vulnerability

The Welcart e-Commerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'custom_order' parameter in all versions up to, and including, 2.12.1 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 injected payload is delivered via the guest checkout form, requiring no authentication, and executes when an administrator views the affected order in the WordPress admin panel.

7.2 CVSS 3.1 High EPSS 0.34% · top 75.6% CWE-79 · Cross-site scripting Deferred
7.2CVSS 3.1 base score
0.34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
8References
1 Sep 2026Last modified by NVD

Description

The Welcart e-Commerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'custom_order' parameter in all versions up to, and including, 2.12.1 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 injected payload is delivered via the guest checkout form, requiring no authentication, and executes when an administrator views the affected order in the WordPress admin panel.

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/usc-e-shop/tags/2.11.34/classes/cart.class.php#L552
https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.34/functions/function.php#L228
https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.34/functions/utility.php#L1548
https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.11.34/includes/order_edit_form.php#L233
https://plugins.trac.wordpress.org/changeset/3673344/usc-e-shop/trunk/includes/order_edit_form.php
https://plugins.trac.wordpress.org/changeset?old_path=%2Fusc-e-shop/tags/2.12.1&new_path=%2Fusc-e-shop/tags/2.12.2
https://wordpress.org/plugins/usc-e-shop/
https://www.wordfence.com/threat-intel/vulnerabilities/id/527630bf-d034-4fcd-8fbe-01b388701049?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-19914), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.