CVE-2026-17520

Newsletters < 4.17 - Unauthenticated API Access via Predictable API Key

Published Aug 29, 2026 CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
Description
The Newsletters WordPress plugin before 4.17 does not generate its API key using a sufficiently random source, deriving it from a publicly known value, allowing unauthenticated attackers to compute the key and perform privileged actions such as adding and deleting subscribers and sending emails, when the optional API has been enabled.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions newsletters
Vendors & Products Wordpress-extensions
Wordpress-extensions newsletters
Type Values Removed Values Added
Weaknesses CWE-326
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-330
Type Values Removed Values Added
Description The Newsletters WordPress plugin before 4.17 does not generate its API key using a sufficiently random source, deriving it from a publicly known value, allowing unauthenticated attackers to compute the key and perform privileged actions such as adding and deleting subscribers and sending emails, when the optional API has been enabled.
Title Newsletters < 4.17 - Unauthenticated API Access via Predictable API Key
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Aug 30, 2026, 12:56 AM
Reserved
Jul 27, 2026, 8:15 AM
Status
Deferred
Published
Aug 29, 2026, 6:17 AM
Modified
Aug 31, 2026, 8:14 PM