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Vulnerability record · CVE-2026-16267 · published 8 August 2026

CVE-2026-16267: Deserialization of untrusted data vulnerability

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.

8.1 CVSS 3.1 High EPSS 0.45% · top 63.2% CWE-502 · Deserialization of untrusted data Deferred
8.1CVSS 3.1 base score
0.45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
26 Aug 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://wpscan.com/vulnerability/b51c11d6-5bfa-4b2c-b348-cda19889deee/

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Source: NIST National Vulnerability Database (record CVE-2026-16267), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.