WordPress security by component

Newsletter – Send awesome emails from

Newsletter – Send awesome emails from (newsletter) is a WordPress plugin with 21 published CVE records in this archive. The latest tracked vulnerability was published Oct 01, 2026; the highest published CVSS base score is 7.6.

Plugin slug: newsletter

Latest vulnerability

CVE-2026-92537: Newsletter – Send awesome emails from WordPress: Tracking URLs expose permanent subscriber credentials

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=-` 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. The official changelog confirms a matching fix in 9.4.0.

PublishedOct 01, 2026

Known safe version9.4.0

Published vulnerabilities for newsletter
		Safe version
Oct 01, 2026	CVE-2026-92537 Newsletter – Send awesome emails from WordPress: Tracking URLs expose permanent subscriber credentials 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=-` 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. The official changelog confirms a matching fix in 9.4.0.	9.4.0	CVE5.3 NVDPending
Sep 18, 2026	CVE-2026-90981 Newsletter – Send awesome emails from WordPress: Reflected XSS reaches logged-in administrators 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(). The attacker needs no login, but successful exploitation requires a logged-in administrator as the victim. The complete request route is not disclosed. Affected versions reported by the CNA: <= 9.3.8. Official changelog review confirms 9.3.9 as a fixed release for this issue.	9.3.9	CVE6.1 NVDPending
Sep 17, 2026	CVE-2026-86824 Newsletter permits forged tracking links and subscriber-session access Newsletter before 9.3.8 generates an email-tracking signing key with insufficient entropy and uses an unkeyed hash to sign tracking links. An unauthenticated attacker who first recovers that key offline can forge links to obtain a subscriber session token, then read and change the subscriber's stored personal data. The export does not disclose the recovery inputs, hash algorithm, link parameters or callback. The described session is a Newsletter subscriber session, not proof of WordPress administrator-login access.	9.3.8	CVE4.8 NVDPending
Sep 16, 2026	CVE-2026-86823 Newsletter leaks subscriber tokens through an unrestricted redirect Newsletter before 9.3.7: An unauthenticated attacker can control the destination of a redirect after a public subscription action. Redirecting a visitor to an external site can disclose a subscriber token that authorizes front-end actions for that subscriber record. The export does not identify the destination parameter, token transport or precise actions granted; it does not establish WordPress account takeover.	9.3.7	CVE5.3 NVDPending
Aug 19, 2026	CVE-2026-66596 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. The vulnerable path is reachable without authentication. Injected script can execute in the affected site's origin when the vulnerable output is viewed. The published affected range is n/a through 9.3.3.	9.3.4	CVE7.1 NVDPending
Jan 20, 2026	CVE-2026-1051 Newsletter – Send awesome emails from: Cross-site request forgery Newsletter – Send awesome emails from is affected by cross-site request forgery. The vulnerable path is reachable without authentication. Exploitation relies on a signed-in privileged user submitting an attacker-controlled request.	See mitigation notes	CVE4.3 NVDPending
Dec 16, 2025	CVE-2025-67999 Newsletter: SQL injection Newsletter is affected by SQL injection. Exposure depends on how the affected operation is made reachable by the site. A successful request can alter database queries and expose or modify WordPress data.	See mitigation notes	CVE7.6 NVDPending
Jun 09, 2025	CVE-2025-3582 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. Exposure depends on how the affected operation is made reachable by the site. Injected script can execute in the affected site's origin when the vulnerable output is viewed.	See mitigation notes	CVE4.8 NVDPending
Jun 09, 2025	CVE-2025-3581 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. Exposure depends on how the affected operation is made reachable by the site. Injected script can execute in the affected site's origin when the vulnerable output is viewed.	See mitigation notes	CVE4.8 NVDPending
Jun 03, 2025	CVE-2025-3584 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. Exposure depends on how the affected operation is made reachable by the site. Injected script can execute in the affected site's origin when the vulnerable output is viewed.	See mitigation notes	CVE4.8 NVDPending
May 05, 2025	CVE-2025-3583 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. Exposure depends on how the affected operation is made reachable by the site. Injected script can execute in the affected site's origin when the vulnerable output is viewed.	See mitigation notes	CVE3.5 NVD4.8
Jun 12, 2024	CVE-2024-5674 Newsletter - API v1 and v2 addon: A security weakness Newsletter - API v1 and v2 addon is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation.	See mitigation notes	CVE6.5 NVDPending
Jun 05, 2024	CVE-2024-5317 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. The vulnerable path is reachable without authentication. Injected script can execute in the affected site's origin when the vulnerable output is viewed.	See mitigation notes	CVE6.4 NVD6.1
May 17, 2024	CVE-2024-30522 Newsletter: Privilege escalation or authentication bypass Newsletter is affected by privilege escalation or authentication bypass. Exposure depends on how the affected operation is made reachable by the site. A successful request can grant permissions or access that the caller should not possess.	See mitigation notes	CVE5.3 NVDPending
Apr 15, 2024	CVE-2024-31434 Newsletter: Cross-site request forgery Newsletter is affected by cross-site request forgery. Exposure depends on how the affected operation is made reachable by the site. Exploitation relies on a signed-in privileged user submitting an attacker-controlled request.	See mitigation notes	CVE5.4 NVDPending
Sep 07, 2023	CVE-2023-4772 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. Exploitation requires an authenticated contributor account. Injected script can execute in the affected site's origin when the vulnerable output is viewed.	See mitigation notes	CVE6.4 NVD5.4
May 23, 2023	CVE-2023-27922 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. The vulnerable path is reachable without authentication. Injected script can execute in the affected site's origin when the vulnerable output is viewed.	See mitigation notes	CVEPending NVD6.1
Jun 20, 2022	CVE-2022-1889 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. Exposure depends on how the affected operation is made reachable by the site. Injected script can execute in the affected site's origin when the vulnerable output is viewed.	See mitigation notes	CVEPending NVD4.8
Jun 13, 2022	CVE-2022-1756 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. Exposure depends on how the affected operation is made reachable by the site. Injected script can execute in the affected site's origin when the vulnerable output is viewed.	See mitigation notes	CVEPending NVD6.1
Jan 01, 2021	CVE-2020-35933 Newsletter: Cross-site scripting Newsletter is affected by cross-site scripting. Exposure depends on how the affected operation is made reachable by the site. Injected script can execute in the affected site's origin when the vulnerable output is viewed.	See mitigation notes	CVE6.5 NVD6.5
Jan 01, 2021	CVE-2020-35932 Newsletter: Code execution Newsletter is affected by code execution. Exposure depends on how the affected operation is made reachable by the site. Successful exploitation can run attacker-controlled code in the WordPress hosting account.	See mitigation notes	CVE7.5 NVD8.8

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