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Medium · 5.4 Public exploit CVE-2026-13156 EUVD-2026-45890GHSA-h2v3-9w9f-v798

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

Published Jul 20, 2026 · Updated Jul 20, 2026 · Assigned by WPScan

Category: Web / CMS

Description

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.

Affected products

VendorProductAffectedFixed
— MailerSend < 1.0.8 1.0.8

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • MinhHK68/CVE-2026-13156 ★ 0 · Jul 21, 2026

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

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References