CVE-2026-12583 — HIGH (8.1)

Vulnerability Description

The Newsletters WordPress plugin before 4.15 does not prevent deserialization of untrusted input that is stored through a public form, allowing unauthenticated attackers to inject a PHP object and, via a property-oriented gadget chain bundled with the Newsletters WordPress plugin before 4.15, write arbitrary files and execute code on the server.

CVSS Score

8.1

HIGH

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-502

References

https://wpscan.com/vulnerability/e4c44105-f43d-4dff-8487-7d8ae2691c4e/

FAQ

What is CVE-2026-12583?

CVE-2026-12583 is a vulnerability with a CVSS score of 8.1 (HIGH). The Newsletters WordPress plugin before 4.15 does not prevent deserialization of untrusted input that is stored through a public form, allowing unauthenticated attackers to inject a PHP object and, vi...

How severe is CVE-2026-12583?

CVE-2026-12583 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-12583?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.