---
id: CVE-2026-86824
title: >-
  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 …
summary: >-
  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 …
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-326
product: Newsletter
affected:
  - Newsletter < 9.3.8
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:08:32.830'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86824'
references:
  - url: 'https://wpscan.com/vulnerability/62ee25d9-ec38-402c-9959-37fd89708aca/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
epss: 0.00152
epssPercentile: 0.03608
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-17T12:12:57.489291Z'
ingestedAt: '2026-09-17T06:12:17.975Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.