CVE-2026-17522: Newsletters < 4.17 - Arbitrary Plugin Option Update via CSRF
The Newsletters WordPress plugin before 4.17 does not perform any nonce or capability check when saving one of its settings screens, and writes every submitted parameter into its own options, allowing attackers to make a logged in administrator overwrite arbitrary Newsletters WordPress plugin before 4.17 settings, including the credential protecting its API, via a Cross-Site Request Forgery attack.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Newsletters WordPress pluginto a version that resolves this vulnerability.Fixed in 4.17
Event History
Frequently Asked Questions
Who is exposed to this issue?
Sites using the Newsletters WordPress plugin at a version earlier than 4.17 are exposed if a logged-in administrator can be induced to visit an attacker-controlled page.
What does an attacker need to exploit it?
The attacker does not need to authenticate to the affected site, but must cause a logged-in administrator's browser to submit a forged request to the vulnerable settings screen.
What is the potential impact?
An attacker can cause arbitrary Newsletters plugin settings to be overwritten, including the credential that protects the plugin's API.