CVE-2023-6381: Improper input validation in Newsletter Software SuperMailer

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-13 · updated 2026-06-17
Weakness: CWE-20

Description

Improper input validation vulnerability in Newsletter Software SuperMailer affecting version 11.20.0.2204. An attacker could exploit this vulnerability by sending a malicious configuration file (file with SMB extension) to a user via a link or email attachment and persuade the user to open the file with the affected software on the local system. A successful exploit could allow the attacker to crash the application when attempting to load the malicious file.

Affected products

Supermailer: 11.20.0.2204

References

https://www.incibe.es/en/incibe-cert/notices/aviso/improper-input-validation-newsletter-software-supermailer
https://www.incibe.es/en/incibe-cert/notices/aviso/improper-input-validation-newsletter-software-supermailer

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