What’s Vulnerable › Vulnerabilities

CVE-2021-43270

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-02 · updated 2026-06-17
• Weakness: CWE-319

Description

Datalust Seq.App.EmailPlus (aka seq-app-htmlemail) 3.1.0-dev-00148, 3.1.0-dev-00170, and 3.1.0-dev-00176 can use cleartext SMTP on port 25 in some cases where encryption on port 465 was intended.

Affected products

• Datalust Seq.App.Emailplus: 3.1.0-dev-00148, 3.1.0-dev-00170, 3.1.0-dev-00176

References

• https://github.com/datalust/seq-app-htmlemail/pull/93
• https://github.com/datalust/seq-app-htmlemail/pull/93

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