CVE-2026-48838 — Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App [post-smtp] < 3.6.3

CVE	Vulnerability	Type	Severity	Affected	Fixed in	Published	Status
CVE-2026-48838	Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App [post-smtp] < 3.6.3	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	High 7.1	< 3.6.3	3.6.3	2026-05-28	—

CVE-2026-48838

The Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 3.6.2 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.

Source: Wordfence

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