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Tool Directory

CVE-2026-13156

MediumPublished

MailerSend - Official SMTP Integration < 1.0.8 - Settings Deletion and Plugin Deactivation via CSRF

Published: Jul 20, 2026
Updated: Jul 20, 2026
Assigning CNA: WPScan
Evidence observed: Aug 28, 2026

Primary CVSS

5.4/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

0.1%

Low · next 30 days

Percentile: 3.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The MailerSend WordPress plugin before 1.0.8 does not perform a nonce check on its configuration-delete action (it verifies the manage_options capability but ignores the nonce), so an attacker can trick a logged-in administrator into visiting a crafted page that wipes the MailerSend WordPress plugin before 1.0.8's SMTP configuration and deactivates the MailerSend WordPress plugin before 1.0.8, breaking the site's email delivery.

Sources

CVE-2026-13156PoC
CVE-2026-13156 Vulnerability Advisory & PoC — Discovered by Huynh Kien Minh (MinhHK).

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