CVE-2026-16267 Details
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.
A vulnerability exists in the Newsletters WordPress plugin in versions prior to 4.16. The issue arises because the plugin does not properly restrict the classes that can be used when unserializing values from public form submissions. This flaw allows unauthenticated attackers to inject arbitrary PHP objects, potentially leading to malicious object injection exploits.
Users are advised to update the Newsletters WordPress plugin to version 4.16 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Aug 8, 2026CISA-ADP
Assessed Aug 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/b51c11d6-5bfa-4b2c-b348-cda19889deee/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-502 | Deserialization of Untrusted Data | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Newsletters | < 4.16 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 11, 2026 | CVE Modified | CISA-ADP |
| Aug 8, 2026 | New CVE Received | [email protected] |