CVE-2026-103519
Received Received - Intake

Arbitrary Shortcode Execution in WP Ultimate Review Plugin

Publication date: 2026-10-03

Last updated on: 2026-10-03

Assigner: Wordfence

Description
The The WP Ultimate Review plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 2.4.3. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for authenticated attackers, with subscriber-level access and above, to execute arbitrary shortcodes. The bypass relies on WordPress's own strip_shortcodes() function unwrapping the [[tag]] double-bracket escape to a bare [tag] that survives wp_insert_post storage and fires when the publicly queryable xs_review post type is rendered through the_content.

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Meta Information

Published
2026-10-03
Last Modified
2026-10-03
Generated
2026-10-03
AI Q&A
2026-10-03
EPSS Evaluated
N/A
NVD
CVE-2026-103519
EUVD
EUVD-2026-91959

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wp_ultimate_review plugin to 2.4.3 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

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Executive Summary

The WP Ultimate Review plugin for WordPress has a flaw where users with subscriber-level access or higher can execute arbitrary shortcodes. This happens because the plugin does not properly validate input before running do_shortcode, allowing attackers to bypass security measures and inject malicious shortcodes.

Detection Guidance

Check for the presence of the WP Ultimate Review plugin version 2.4.3 or lower. Inspect WordPress logs for unusual shortcode execution in posts of type xs_review. Use commands like grep -r 'xs_review' /var/www/html/ to search for affected content.

Impact Analysis

An attacker could exploit this to execute unauthorized actions on your WordPress site, such as stealing data, defacing pages, or redirecting visitors. Since it requires only subscriber-level access, the risk is higher for sites with open registration.

Compliance Impact

This vulnerability allows authenticated attackers with subscriber-level access to execute arbitrary shortcodes, which could lead to unauthorized data access, modification, or disclosure. This may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data privacy) by enabling unauthorized processing or exposure of sensitive information.

Mitigation Strategies

Update the WP Ultimate Review plugin to the latest version. Remove or disable the plugin if an update is unavailable. Review and sanitize all xs_review post content for malicious shortcodes.

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