What’s Vulnerable › Vulnerabilities

CVE-2023-5109: WP Mailto Links – Protect Email Addresses <= 3.1.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-10-20 · updated 2026-06-17
• Weakness: CWE-79

Description

The WP Mailto Links – Protect Email Addresses plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'wpml_mailto' shortcode in versions up to, and including, 3.1.3 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This was partially patched in version 3.1.3 and fully patched in version 3.1.4.

Affected products

• onlineoptimisation WP Mailto Links – Protect Email Addresses: before 3.1.4 — fixed in 3.1.4

How to fix

Upgrade to a fixed version: onlineoptimisation WP Mailto Links – Protect Email Addresses 3.1.4. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/browser/wp-mailto-links/tags/3.1.2/core/includes/classes/class-wp-mailto-links-validate.php#L582
• https://www.wordfence.com/threat-intel/vulnerabilities/id/ec882062-0059-47ca-a007-3347e7adb70b?source=cve
• https://plugins.trac.wordpress.org/browser/wp-mailto-links/tags/3.1.2/core/includes/classes/class-wp-mailto-links-validate.php#L582
• https://www.wordfence.com/threat-intel/vulnerabilities/id/ec882062-0059-47ca-a007-3347e7adb70b?source=cve

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