CVE-2026-9635
Received Received - Intake

Stored XSS in WP Shortcode by MyThemeShop Plugin

Publication date: 2026-07-23

Last updated on: 2026-07-23

Assigner: Wordfence

Description
The WP Shortcode by MyThemeShop plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'title' parameter of the [tab] shortcode in versions up to, and including, 1.4.17. This is due to insufficient input sanitization and output escaping in the mts_tabs() function, which outputs the title shortcode attribute directly into the HTML output between anchor tags without applying any escaping functions. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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Meta Information

Published
2026-07-23
Last Modified
2026-07-23
Generated
2026-07-23
AI Q&A
2026-07-23
EPSS Evaluated
N/A
NVD
CVE-2026-9635

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mythemeshop wp_shortcode to 1.4.17 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a Stored Cross-Site Scripting (XSS) vulnerability in the WP Shortcode by MyThemeShop WordPress plugin. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts via the 'title' parameter in the [tab] shortcode. The issue occurs because the plugin does not properly sanitize or escape user input before outputting it in HTML.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the WP Shortcode by MyThemeShop plugin versions up to 1.4.17. Check for unauthorized scripts in the title parameter of [tab] shortcodes. Review user roles with contributor access or higher for suspicious activity.

Impact Analysis

An attacker could exploit this to inject malicious scripts into your WordPress site. When visitors view the affected page, the injected script could steal cookies, session tokens, or other sensitive data. It may also allow attackers to perform actions on behalf of users or deface your website.

Compliance Impact

This vulnerability could lead to data breaches, compromising user data and violating privacy regulations like GDPR or HIPAA. If exploited, it may result in unauthorized access to personal data, leading to legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Immediately update the WP Shortcode by MyThemeShop plugin to the latest version. Remove or restrict contributor-level access to untrusted users. Scan for and remove any injected scripts in page content.

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