What’s Vulnerable › Vulnerabilities

CVE-2024-13521: MailUp Auto Subscription <= 1.1.0 - Cross-Site Request Forgery to Stored Cross-Site Scripting

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-01-28 · updated 2026-06-17
• Weakness: CWE-352

Description

The MailUp Auto Subscription plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.1.0. This is due to missing or incorrect nonce validation on the mas_options function. This makes it possible for unauthenticated attackers to update settings and inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

• ghera74 MailUp Auto Subscription: before 1.2.0 — fixed in 1.2.0

How to fix

Upgrade to a fixed version: ghera74 MailUp Auto Subscription 1.2.0. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3060078%40mailup-auto-subscribtion%2Ftags%2F1.1.0&new=3229728%40mailup-auto-subscribtion%2Ftags%2F1.2.0
• https://www.wordfence.com/threat-intel/vulnerabilities/id/9ee9b2e9-e3fe-43b2-9caf-7246a4201fe9?source=cve

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