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CVE-2023-6527

MEDIUM 6.1 CVSS 3.1
Published
December 6, 2023
Last modified
June 17, 2026
NVD status
Modified
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Description

The Email Subscription Popup plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the HTTP_REFERER header in all versions up to, and including, 1.2.18 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Affected WordPress components

  • Email Subscription Popup — Newsletter & GDPR Consent Plugin · email-subscribe
    Confirmed match Active
    Up to and including 1.2.18
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • nik00726 Email Subscription Popup — Up to and including 1.2.18
  • i13websolution email_subscription_popup — Before 1.2.19

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/email-subscribe/tags/1.2.19/wp-email-subscription.php?rev=3005188#L2125 Patch
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/5f84814e-f7b7-4228-b331-63027a0770af?source=cve Third Party Advisory
  • nvd.nist.gov Official NVD record