CVE-2025-11876
Mailgun Subscriptions <= 1.3.1 - Authenticated (Contributor+) Stored Cross-Site Scripting
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | jbrinley |
| Product | mailgun subscriptions |
| Published | Dec 12, 2025 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
jbrinley / Mailgun Subscriptions
0 ≤ 1.3.1
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/149e60cc-9612-4651-b02d-4b68a3533d36?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/mailgun-subscriptions/tags/1.2.0/Mailgun_Subscriptions/Subscription_Form.php#L101 github.com: https://github.com/flightless/mailgun-subscriptions/pull/8/commits/a8b597e3a09f3a1b76436d09de434fd9bfe29f64 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3413662%40mailgun-subscriptions&new=3413662%40mailgun-subscriptions&sfp_email=&sfph_mail=
Credits
Gilang Asra Bilhadi