CVE-2026-86823 Details
Description
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.
A vulnerability exists in the Newsletter WordPress plugin in versions prior to 9.3.7. The issue arises because the plugin fails to validate the destination of redirects after a public subscription action. This flaw allows unauthenticated attackers to redirect users to arbitrary external sites and to disclose a subscriber token, which can be used to access that subscriber's front-end actions.
Users are advised to update the Newsletter WordPress plugin to version 9.3.7 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 16, 2026CISA-ADP
Assessed Sep 17, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/2db98679-24ca-494e-a8fd-f6417a0f1ea8/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-601 | URL Redirection to Untrusted Site ('Open Redirect') | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Newsletter | < 9.3.7 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 17, 2026 | CVE Modified | CISA-ADP |
| Sep 16, 2026 | New CVE Received | [email protected] |