Newsletters < 4.16 - Unauthenticated PHP Object Injection via Date Form Field
Summary
| CVE | CVE-2026-16267 |
|---|---|
| State | PUBLISHED |
| Assigner | WPScan |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-08 07:17:09 UTC |
| Updated | 2026-08-08 07:17:09 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.1 HIGH from ADP
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.002670000 probability, percentile 0.187920000 (date 2026-08-12)
Problem Types: CWE-502 Deserialization of Untrusted Data | CWE-502 CWE-502 Deserialization of Untrusted Data
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Unknown | Newsletters | affected 4.16 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| wpscan.com/vulnerability/b51c11d6-5bfa-4b2c-b348-cda19889deee | [email protected] | wpscan.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Sai Praneeth Koti (en)
CNA: WPScan (en)
There are currently no legacy QID mappings associated with this CVE.