Arbitrary Argument Injection Affecting github.com/wneessen/go-mail/smtp package, versions <0.7.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published30 Sept 2025
- disclosed29 Sept 2025
- creditxclow3n
Introduced: 29 Sep 2025
NewCVE-2025-59937 Â (opens in a new tab)How to fix?
Upgrade github.com/wneessen/go-mail/smtp to version 0.7.1 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Argument Injection via improper handling of the mail.Address value. An attacker can manipulate email routing or inject unauthorized SMTP parameters by supplying specially crafted email addresses.
Note: This is only exploitable if email addresses are accepted as user input, such as through a web form, rather than using static addresses without quoted local parts.