CVE-2026-16267CWE-502insecure-deserialization

CVE-2026-16267

High · published August 8, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
38.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00453 · 38.4th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-08-08T11:17Z
References (1)
https://wpscan.com/vulnerability/b51c11d6-5bfa-4b2c-b348-cda19889deee/ · [email protected]
EPSS history
Timeline
  • 08 AUG 06:00Z
    Newsletters < 4.16 - Unauthenticated PHP Object Injection via Date Form Field
    cvelistv5