CVE-2026-16264: CWE-639 Authorization Bypass Through User-Controlled Key in Newsletters
The Newsletters WordPress plugin before 4.18.1 does not perform an ownership check on some of its subscriber management actions, and issues a management session to unauthenticated visitors on request, allowing attackers to read any subscriber's personal data and overwrite any subscriber's record including their email address.
AI Analysis
Technical Summary
CVE-2026-16264 is an authorization bypass vulnerability (CWE-639) in the Newsletters WordPress plugin prior to version 4.18.1. The plugin fails to verify ownership on certain subscriber management actions and issues management sessions to unauthenticated visitors upon request. This enables attackers to access any subscriber's personal information and modify subscriber records, including changing email addresses.
Potential Impact
Attackers can read sensitive personal data of any subscriber and overwrite subscriber records, potentially leading to unauthorized access, data manipulation, or disruption of newsletter delivery.
Mitigation Recommendations
Upgrade the Newsletters WordPress plugin to version 4.18.1 or later, where this vulnerability has been fixed. No other mitigation is indicated.
CVE-2026-16264: CWE-639 Authorization Bypass Through User-Controlled Key in Newsletters
Description
The Newsletters WordPress plugin before 4.18.1 does not perform an ownership check on some of its subscriber management actions, and issues a management session to unauthenticated visitors on request, allowing attackers to read any subscriber's personal data and overwrite any subscriber's record including their email address.
CVSS v3.1
Score 6.5medium
Affected software
Newsletters
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16264 is an authorization bypass vulnerability (CWE-639) in the Newsletters WordPress plugin prior to version 4.18.1. The plugin fails to verify ownership on certain subscriber management actions and issues management sessions to unauthenticated visitors upon request. This enables attackers to access any subscriber's personal information and modify subscriber records, including changing email addresses.
Potential Impact
Attackers can read sensitive personal data of any subscriber and overwrite subscriber records, potentially leading to unauthorized access, data manipulation, or disruption of newsletter delivery.
Mitigation Recommendations
Upgrade the Newsletters WordPress plugin to version 4.18.1 or later, where this vulnerability has been fixed. No other mitigation is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-07-20T08:42:08.802Z
- State
- PUBLISHED
Threat ID: 6ab36d3df7a7c541065abc8e
Added to database: 09/23/2026, 06:10:05 UTC
Last enriched: 09/23/2026, 06:33:53 UTC
Last updated: 09/24/2026, 01:57:05 UTC
Views: 5
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