WordPress plugin
SmartSMTP security & vulnerabilities
No known unpatched vulnerabilities in the latest version
All 1 known vulnerability is fixed in the latest release. If you run an older version, update to null or newer.
1Known vulnerabilities
- Critical0
- High1
- Medium0
- Low0
All SmartSMTP vulnerabilities
| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤1.2.0Update to 1.2.1 | CVE-2026-66606 |
- High7.2Unauthenticated Stored Cross-Site Scripting
≤1.2.0Update to 1.2.1
SmartSMTP: common questions
Does SmartSMTP have known vulnerabilities?
Yes. VulnCrest Radar lists 1 known vulnerability in SmartSMTP: 1 high. None are known to affect version null.
How do I check which version of SmartSMTP I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent SmartSMTP vulnerability?
CVE-2026-66606, published Aug 19, 2026: SmartSMTP <= 1.2.0 - Unauthenticated Stored Cross-Site Scripting. Severity: High (CVSS 7.2).
Is any SmartSMTP vulnerability listed in CISA KEV?
No. None of the known SmartSMTP vulnerabilities is currently listed in the CISA KEV catalog.