PT-2025-50898 · WordPress · Mailgun Subscriptions

Published 2025-12-12 · Updated 2025-12-12 · CVE-2025-11876

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Mailgun Subscriptions versions up to and including 1.3.1

Description The Mailgun Subscriptions plugin for WordPress is susceptible to Stored Cross-Site Scripting through the 'mailgun subscription form' shortcode. This is due to inadequate input sanitization and output escaping of user-provided attributes. Authenticated attackers with contributor-level access or higher can inject arbitrary web scripts into pages. These scripts will execute when a user accesses the affected page.

Recommendations Update Mailgun Subscriptions to a version newer than 1.3.1.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-11876

Affected Products

Mailgun Subscriptions

References · 8

• https://osv.dev/vulnerability/CVE-2025-11876 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-11876 · Security Note
• https://github.com/flightless/mailgun-subscriptions/pull/8/commits/a8b597e3a09f3a1b76436d09de434fd9bfe29f64 · Note
• https://t.me/CVEtracker/39595 · Telegram Post
• https://plugins.trac.wordpress.org/browser/mailgun-subscriptions/tags/1.2.0/Mailgun_Subscriptions/Subscription_Form.php#L101 · Note
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3413662%40mailgun-subscriptions&new=3413662%40mailgun-subscriptions&sfp_email=&sfph_mail= · Note
• https://t.me/cveNotify/145568 · Telegram Post
• https://wordfence.com/threat-intel/vulnerabilities/id/149e60cc-9612-4651-b02d-4b68a3533d36?source=cve · Note