PT-2026-61533 · WordPress · Mailersend

CVE-2026-13156 · Published 2026-07-20 · Updated 2026-07-20

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions MailerSend WordPress plugin versions prior to 1.0.8

Description Cross-Site Request Forgery (CSRF) occurs because the plugin fails to perform a nonce check on its configuration-delete action. While the plugin verifies the manage options capability, it ignores the nonce, allowing an attacker to trick a logged-in administrator into visiting a crafted page. This action wipes the SMTP configuration and deactivates the plugin, which disrupts the site's email delivery.

Recommendations Update MailerSend WordPress plugin to version 1.0.8 or later.

Exploit

Fix

CSRF

Weakness Enumeration

CWE-352

Related Identifiers

CVE-2026-13156

Affected Products

Mailersend

References · 3

• 🔥 https://wpscan.com/vulnerability/595e653d-0904-43cf-8e61-d684599de11b · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-13156 · Security Note
• https://twitter.com/VulmonFeeds/status/2079120179171033296 · Twitter Post