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OpenAdvisories
High · 8.1 CVE-2026-16267 EUVD-2026-54729GHSA-jxc3-pfg8-hv86

Newsletters < 4.16 - Unauthenticated PHP Object Injection via Date Form Field

Published Aug 8, 2026 · Updated Aug 11, 2026 · Assigned by WPScan

Description

The Newsletters WordPress plugin before 4.16 does not restrict the classes allowed when unserialising a value taken from a public form submission, allowing unauthenticated attackers to inject arbitrary PHP objects.

Affected products

VendorProductAffectedFixed
— Newsletters < 4.16 4.16

References