CVE-2026-90981
Description
The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'nn' parameter in all versions up to, and including, 9.3.8 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. Successful exploitation requires the victim to be a logged-in administrator, as the antibot check auto-passes for authenticated users, routing the unsanitized payload through the administrator-visible output branch of dienow().
Affected WordPress components
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Newsletter – Send awesome emails from WordPress Plugin · newsletterUp to and including 9.3.8View on WordPress.org
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newsletter Theme · newsletterUp to and including 9.3.8View 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
- satollo Newsletter – Send awesome emails from WordPress — Up to and including 9.3.8
References
- plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/includes/antispam.php#L35
- plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/includes/module-base.php#L1310
- plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/plugin.php#L156
- plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/subscription/subscription.php#L238
- plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/subscription/subscription.php#L682
- plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&old=3695457%40newsletter&new=3695457%40newsletter
- www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/44b3b015-2482-4b80-b208-73f1abe21b27?source=cve
- nvd.nist.gov Official NVD record