CVE-2025-11876

The Mailgun Subscriptions plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'mailgun_subscription_form' shortcode in all versions up to, and including, 1.3.1 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

The following products are affected by CVE-2025-11876 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-11876.

URL	Resource
https://github.com/flightless/mailgun-subscriptions/pull/8/commits/a8b597e3a09f3a1b76436d09de434fd9bfe29f64
https://plugins.trac.wordpress.org/browser/mailgun-subscriptions/tags/1.2.0/Mailgun_Subscriptions/Subscription_Form.php#L101
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3413662%40mailgun-subscriptions&new=3413662%40mailgun-subscriptions&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/149e60cc-9612-4651-b02d-4b68a3533d36?source=cve