What’s Vulnerable › Vulnerabilities

CVE-2023-4772: Newsletter <= 7.8.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-07 · updated 2026-06-17
• Weakness: CWE-79

Description

The Newsletter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'newsletter_form' shortcode in versions up to, and including, 7.8.9 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• satollo Newsletter – Send awesome emails from WordPress: through 7.8.9

References

• https://plugins.trac.wordpress.org/browser/newsletter/tags/7.8.9/subscription/subscription.php#L1653
• https://plugins.trac.wordpress.org/changeset/2955097/newsletter#file21
• https://www.wordfence.com/threat-intel/vulnerabilities/id/87da5300-1add-44fc-a3e0-e8912f946c84?source=cve
• https://plugins.trac.wordpress.org/browser/newsletter/tags/7.8.9/subscription/subscription.php#L1653
• https://plugins.trac.wordpress.org/changeset/2955097/newsletter#file21
• https://www.wordfence.com/threat-intel/vulnerabilities/id/87da5300-1add-44fc-a3e0-e8912f946c84?source=cve

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