CVE-2026-3090

HIGH EPSS 13.6%

Published Mar 18, 20263mo ago · Modified Jun 17, 20261w ago

7.2 CVSS 3.1

High

Published Mar 18, 2026 3mo ago

Last Modified Jun 17, 2026 1w ago

Description

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 via the ‘event_type’ parameter in all versions up to, and including, 3.8.0 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. The vulnerability is only exploitable when the Post SMTP Pro plugin is also installed and its Reporting and Tracking extension is enabled.

CVSS Details

Base Score

7.2

Exploitability

3.9

Impact

2.7

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Changed

Confidentiality Low

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

13.6% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 3

plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/post-smtp/trunk/Postman/PostmanEmailLogs.php#L459
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3484515/
wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/3f8cbbbb-2089-4966-8fd3-da4f76fb2517?source=cve

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.