Unknown Newsletter vulnerabilities
6 vulnerabilities
Known vulnerabilities in Unknown Newsletter, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
MediumCVE-2025-3583thenewsletterplugin · newsletter +2 moreNewsletter < 8.7.1 - Admin+ Stored XSSThe Newsletter WordPress plugin before 8.7.1 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).EPSS0.31%MediumCVE-2025-3584thenewsletterplugin · newsletter +2 moreNewsletter < 8.8.2 - Admin+ Stored XSS via SubscriptionThe Newsletter WordPress plugin before 8.8.2 does not sanitise and escape some of its Subscription settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).EPSS0.25%MediumCVE-2025-3581thenewsletterplugin · newsletter +2 moreNewsletter < 8.8.5 - Admin+ Stored XSS via WidgetThe Newsletter WordPress plugin before 8.8.5 does not validate and escape some of its Widget options before outputting them back in a page/post where the block is embed, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).EPSS0.26%MediumCVE-2025-3582thenewsletterplugin · newsletter +2 moreNewsletter < 8.8.5 - Admin+ Stored XSS via FormThe Newsletter WordPress plugin before 8.85 does not sanitise and escape some of its Form settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).EPSS0.26%MediumCVE-2026-86824unknown · newsletter +1 moreNewsletter < 9.3.8 - Unauthenticated Subscriber PII Disclosure and Modification via Predictable Tracking Signature KeyThe Newsletter WordPress plugin before 9.3.8 does not generate its email tracking signing key with sufficient entropy and signs its tracking links with an unkeyed hash, allowing an unauthenticated attacker who recovers that key offline to forge tracking links, obtain any subscriber's session token, and read and modify that subscriber's stored personal data.EPSS0.15%MediumCVE-2026-86823unknown · newsletter +1 moreNewsletter < 9.3.7 - Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu ParameterThe Newsletter WordPress plugin before 9.3.7 does not validate the destination of the redirect performed after a public subscription action, allowing unauthenticated attackers to redirect users to arbitrary external sites and to disclose a subscriber token that grants access to that subscriber record's front-end actions.EPSS0.32%