Vulnerability · Published Sep 16, 2026 · Assigned by WPScan
CVE-2026-86823Newsletter < 9.3.7 - Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu Parameter
Medium 5.3
In plain English
A medium-severity open redirect in Newsletter from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 74.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Newsletter | 0 – before 9.3.7 |
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- https://wpscan.com/vulnerability/2db98679-24ca-494e-a8fd-f6417a0f1ea8/ exploit, vdb-entry, technical-description