What’s Vulnerable › Vulnerabilities

CVE-2026-4005: Coachific Shortcode <= 1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'userhash' Shortcode Attribute

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-15 · updated 2026-06-17
• Weakness: CWE-79

Description

The Coachific Shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'userhash' shortcode attribute in all versions up to and including 1.0. This is due to insufficient input sanitization and output escaping. The plugin uses sanitize_text_field() on the 'userhash' parameter, which strips HTML tags but does not escape characters significant in a JavaScript string context (such as double quotes, semicolons, and parentheses). The sanitized value is then directly interpolated into a JavaScript string within a <script> tag on line 29 without any JavaScript-specific escaping (e.g., wp_json_encode() or esc_js()). 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.

Affected products

• Coachific Shortcode: through 1.0

References

• https://plugins.trac.wordpress.org/browser/coachific-shortcode/tags/1.0/coachific.php#L13
• https://plugins.trac.wordpress.org/browser/coachific-shortcode/tags/1.0/coachific.php#L29
• https://plugins.trac.wordpress.org/browser/coachific-shortcode/trunk/coachific.php#L13
• https://plugins.trac.wordpress.org/browser/coachific-shortcode/trunk/coachific.php#L29
• https://www.wordfence.com/threat-intel/vulnerabilities/id/3d91158c-0b34-460e-9fdb-b99165ebca78?source=cve

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