CVE-2025-59937
For successful exploitation, it is required that the user's code allows for arbitrary mail address input (i. e. through a web form or similar).
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.54%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
go-mail is a comprehensive library for sending mails with Go. In versions 0.7.0 and below, due to incorrect handling of the mail.Address values when a sender- or recipient address is passed to the corresponding MAIL FROM or RCPT TO commands of the SMTP client, there is a possibility of wrong address routing or even ESMTP parameter smuggling. For successful exploitation, it is required that the user's code allows for arbitrary mail address input (i. e. through a web form or similar). If only static mail addresses are used (i. e. in a config file) and the mail addresses in use do not consist of quoted local parts, this should not affect users. This issue is fixed in version 0.7.1
- CVSS 4.0
- 8.2 HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.54% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-88
- Affected
- pebcak/go-mail
- Source
- security-advisories@github.com
References
- https://github.com/wneessen/go-mail/commit/42e92cfe027be04aff72921adb0f72f11d517479Patch
- https://github.com/wneessen/go-mail/issues/495Exploit, Issue Tracking
- https://github.com/wneessen/go-mail/pull/496Issue Tracking, Patch
- https://github.com/wneessen/go-mail/security/advisories/GHSA-wpwj-69cm-q9c5Vendor Advisory
- https://github.com/wneessen/go-mail/issues/495Exploit, Issue Tracking
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.