Unauthenticated XSS in SmartSMTP Plugin by WordPress
CVE-2026-66606

7.1HIGH

Key Information:

Vendor

WordPress
Status
Smartsmtp
Vendor
CVE Published:
20 August 2026

What is CVE-2026-66606?

The SmartSMTP plugin for WordPress versions up to 1.2.0 is vulnerable to unauthenticated Cross Site Scripting (XSS). This vulnerability allows attackers to inject malicious scripts into web pages, which can then be executed in the context of a user's browser. As a result, user data may be compromised and security may be jeopardized. Website administrators are advised to update to the latest version to mitigate the risks associated with this vulnerability.

Affected Version(s)

SmartSMTP <= 1.2.0

References

https://patchstack.com/database/wordpress/plugin/smart-sm...
vdb-entry

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jorgson | Patchstack Bug Bounty Program
.