{"id":"CVE-2026-16267","title":"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.","summary":"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.","severity":"none","published":"2026-08-08","updated":"2026-08-08","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-16267","references":[{"url":"https://wpscan.com/vulnerability/b51c11d6-5bfa-4b2c-b348-cda19889deee/","label":"contact@wpscan.com"}],"tags":["nvd"],"epss":0.00267,"epssPercentile":0.19122,"ingestedAt":"2026-08-09T03:32:40.174Z","slug":"CVE-2026-16267","body":"## Overview\n\nThe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}