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Newsletter vulnerabilities
Newsletter has 17 known vulnerabilities in this database. The most recent published record is dated 2 Oct 2026.
- Known vulnerabilities
- 17
- Active installs
- 200,000+
- Latest version
- 9.4.6
- Last updated
- 1 Oct 2026
- Most recent
- 2 Oct 2026
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Cross-site scripting (XSS) CVE-2026-96566 | High 7.2 | Up to 9.4.0 | Fixed in a later version (latest 9.4.6) | 5 d ago |
| Security weakness CVE-2026-92537 | Medium 5.3 | Up to 9.3.9 | Fixed in a later version (latest 9.4.6) | 6 d ago |
| Cross-site scripting (XSS) CVE-2026-90981 | Medium 6.1 | Up to 9.3.8 | Fixed in a later version (latest 9.4.6) | 18 Sep 2026 |
| Security weakness CVE-2026-86824 | Medium 4.8 | Before 9.3.8 | Fixed in 9.3.8 | 17 Sep 2026 |
| Open redirect CVE-2026-86823 | Medium 5.3 | Before 9.3.7 | Fixed in 9.3.7 | 16 Sep 2026 |
| Cross-site request forgery (CSRF) CVE-2026-1051 | Medium 4.3 | Up to 9.1.0 | Fixed in a later version (latest 9.4.6) | 20 Jan 2026 |
| Cross-site scripting (XSS) CVE-2025-3581 | Medium 4.8 | Before 8.8.5 | Fixed in 8.8.5 | 9 Jun 2025 |
| Cross-site scripting (XSS) CVE-2025-3582 | Medium 4.8 | Before 8.8.5 | Fixed in 8.8.5 | 9 Jun 2025 |
| Cross-site scripting (XSS) CVE-2025-3584 | Medium 4.8 | Before 8.8.2 | Fixed in 8.8.2 | 3 Jun 2025 |
| Cross-site scripting (XSS) CVE-2025-3583 | Medium 4.8 | Before 8.7.1 | Fixed in 8.7.1 | 5 May 2025 |
| Broken access control CVE-2024-5674 | Medium 6.5 | Before 2.4.6 | Fixed in 2.4.6 | 12 Jun 2024 |
| Cross-site scripting (XSS) CVE-2024-5317 | Medium 6.4 | Before 8.3.5 | Fixed in 8.3.5 | 5 Jun 2024 |
| Cross-site scripting (XSS) CVE-2023-4772 | Medium 6.4 | Up to 7.8.9 | Fixed in a later version (latest 9.4.6) | 7 Sep 2023 |
| Cross-site scripting (XSS) CVE-2022-1889 | Medium 4.8 | Before 7.4.6 | Fixed in 7.4.6 | 20 Jun 2022 |
| Cross-site scripting (XSS) CVE-2022-1756 | Medium 6.1 | Before 7.4.5 | Fixed in 7.4.5 | 13 Jun 2022 |
| PHP object injection CVE-2020-35932 | High 7.5 | Before 6.8.2 | Fixed in 6.8.2 | 1 Jan 2021 |
| Cross-site scripting (XSS) CVE-2020-35933 | Medium 6.5 | Before 6.8.2 | Fixed in 6.8.2 | 1 Jan 2021 |
Read the published descriptions
- CVE-2026-96566, 2 Oct 2026
- The Newsletter - Send awesome emails from WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'np1' Custom Field Parameter in all versions up to, and including, 9.4.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The subscription endpoint (na=sa) requires no nonce, no capability check, and no CAPTCHA, and the payload can be smuggled past email-address validation by embedding the {profile_1} placeholder in the local part of the submitted address, since WordPress's is_email() permits curly braces there. CVE record
- CVE-2026-92537, 1 Oct 2026
- The Newsletter - Send awesome emails from WordPress plugin for WordPress is vulnerable to Insufficiently Protected Credentials in all versions up to, and including, 9.3.9 The plugin's public click-tracking REST route `/tnp/l/` is registered with `permission_callback => '__return_true'` and, upon receiving a valid keyed-MD5 signature, calls `set_user_cookie()`, which emits a `Set-Cookie: newsletter=<id>-<raw_token>` response header to the requester because the subscriber object loaded via `get_user()` lacks the `_trusted` property, causing `get_user_key()` to return the raw token column value instead of its MD5-masked variant. This makes it possible for unauthenticated attackers who obtain any signed click-tracking URL for a target subscriber to receive that subscriber's permanent raw authentication cookie, which they can then use to export the subscriber's full PII record via the JSON profile-export endpoint (`?na=px`), rewrite the subscriber's stored profile (`?na=ps`), and silently unsubscribe the subscriber via the RFC-8058 one-click endpoint (`?na=ocu`), none of which require a nonce, password, or email challenge. Signed tracking URLs are embedded in every external link of every newsletter delivered to a subscriber, carry no timestamp, and never expire until the site's relink key rotates, meaning that any party who observes such a URL - through a forwarded email, a shared inbox, a mail-gateway log, or Referer headers on the redirect target, which has no Referrer-Policy set - can replay it indefinitely to obtain the victim's credential. CVE record
- CVE-2026-90981, 18 Sep 2026
- 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(). CVE record
- CVE-2026-86824, 17 Sep 2026
- The 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. CVE record
- CVE-2026-86823, 16 Sep 2026
- The 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. CVE record
- CVE-2026-1051, 20 Jan 2026
- The Newsletter - Send awesome emails from WordPress plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 9.1.0. This is due to missing or incorrect nonce validation on the hook_newsletter_action() function. This makes it possible for unauthenticated attackers to unsubscribe newsletter subscribers via a forged request granted they can trick a logged-in user into performing an action such as clicking on a link. CVE record
- CVE-2025-3581, 9 Jun 2025
- The 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). CVE record
- CVE-2025-3582, 9 Jun 2025
- The 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). CVE record
- CVE-2025-3584, 3 Jun 2025
- The 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). CVE record
- CVE-2025-3583, 5 May 2025
- The 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). CVE record
- CVE-2024-5674, 12 Jun 2024
- The Newsletter - API v1 and v2 addon plugin for WordPress is vulnerable to unauthorized subscribers management due to PHP type juggling issue on the check_api_key function in all versions up to, and including, 2.4.5. This makes it possible for unauthenticated attackers to list, create or delete newsletter subscribers. This issue affects only sites running the PHP version below 8.0 CVE record
- CVE-2024-5317, 5 Jun 2024
- The Newsletter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'np1' parameter in all versions up to, and including, 8.3.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. CVE record
- CVE-2023-4772, 7 Sep 2023
- 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. CVE record
- CVE-2022-1889, 20 Jun 2022
- The Newsletter WordPress plugin before 7.4.6 does not escape and sanitise the preheader_text setting, which could allow high privilege users to perform Stored Cross-Site Scripting attacks when the unfilteredhtml is disallowed CVE record
- CVE-2022-1756, 13 Jun 2022
- The Newsletter WordPress plugin before 7.4.5 does not sanitize and escape the $_SERVER['REQUEST_URI'] before echoing it back in admin pages. Although this uses addslashes, and most modern browsers automatically URLEncode requests, this is still vulnerable to Reflected XSS in older browsers such as Internet Explorer 9 or below. CVE record
- CVE-2020-35932, 1 Jan 2021
- Insecure Deserialization in the Newsletter plugin before 6.8.2 for WordPress allows authenticated remote attackers with minimal privileges (such as subscribers) to use the tpnc_render AJAX action to inject arbitrary PHP objects via the options[inline_edits] parameter. NOTE: exploitability depends on PHP objects that might be present with certain other plugins or themes. CVE record
- CVE-2020-35933, 1 Jan 2021
- A Reflected Authenticated Cross-Site Scripting (XSS) vulnerability in the Newsletter plugin before 6.8.2 for WordPress allows remote attackers to trick a victim into submitting a tnpc_render AJAX request containing either JavaScript in an options parameter, or a base64-encoded JSON string containing JavaScript in the encoded_options parameter. CVE record
What to do if you run Newsletter
If you run Newsletter, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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