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Vulnerability record · CVE-2026-12583 · published 14 July 2026

CVE-2026-12583: Deserialization of untrusted data vulnerability

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.

8.1 CVSS 3.1 High EPSS 0.55% · top 56.1% CWE-502 · Deserialization of untrusted data Deferred
8.1CVSS 3.1 base score
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
14 Jul 2026Last modified by NVD

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

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-12583), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.