CVE-2026-86824
Medium
Description
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.
SeverityMedium
CVSS4.8
Exploit probability—
ProductNewsletter
PublishedSep 17, 2026
First seenSep 17, 2026
Weakness typeCWE-326CWE-326
How to fix
Update
- Newsletter9.3.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Newsletter | v < 9.3.8 | 9.3.8 |
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