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OpenAdvisories
High · 7.2 CVE-2025-0521 EUVD-2025-4802GHSA-3f9v-jhc5-p8jp

Post SMTP <= 3.0.2 - Unauthenticated Stored Cross-Site Scripting

Published Feb 18, 2025 · Updated Apr 8, 2026 · Assigned by Wordfence

Description

The Post SMTP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the from and subject parameter in all versions up to, and including, 3.0.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

VendorProductAffectedFixed
saadiqbal Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App ≤ 3.0.2 —

References