Smartertools: >> Smartermail Security Vulnerabilities
SmarterTools SmarterMail versions prior to build 9518 contain an unauthenticated path coercion vulnerability in the background-of-the-day preview endpoint. The application base64-decodes attacker-supplied input and uses it as a filesystem path without validation. On Windows systems, this allows UNC paths to be resolved, causing the SmarterMail service to initiate outbound SMB authentication attempts to attacker-controlled hosts. This can be abused for credential coercion, NTLM relay attacks, and unauthorized network authentication.
CVSS Score
6.9
EPSS Score
0.0
Published
2026-01-29
CVE-2026-24423
SmarterTools SmarterMail versions prior to build 9511 contain an unauthenticated remote code execution vulnerability in the ConnectToHub API method. The attacker could point the SmarterMail to the malicious HTTP server, which serves the malicious OS command. This command will be executed by the vulnerable application.
Known exploited
CVSS Score
9.3
EPSS Score
0.664
Published
2026-01-23
CVE-2026-23760
SmarterTools SmarterMail versions prior to build 9511 contain an authentication bypass vulnerability in the password reset API. The force-reset-password endpoint permits anonymous requests and fails to verify the existing password or a reset token when resetting system administrator accounts. An unauthenticated attacker can supply a target administrator username and a new password to reset the account, resulting in full administrative compromise of the SmarterMail instance. NOTE: SmarterMail system administrator privileges grant the ability to execute operating system commands via built-in management functionality, effectively providing administrative (SYSTEM or root) access on the underlying host.
Known exploited
CVSS Score
9.3
EPSS Score
0.799
Published
2026-01-22
CVE-2025-52691
Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.
Known exploited
CVSS Score
10.0
EPSS Score
0.873
Published
2025-12-29
SmarterTools SmarterMail 8495 through 8664 before 8747 allows stored XSS by using image/svg+xml and an uploaded SVG document. This occurs because the application tries to allow youtube.com URLs, but actually allows youtube.com followed by an @ character and an attacker-controlled domain name.
CVSS Score
5.4
EPSS Score
0.002
Published
2023-12-21
SmarterTools SmarterMail 8495 through 8664 before 8747 allows stored DOM XSS because an XSS protection mechanism is skipped when messageHTML and messagePlainText are set in the same request.
CVSS Score
5.4
EPSS Score
0.002
Published
2023-12-21
SmarterTools SmarterMail 8495 through 8664 before 8747 allows stored XSS via a crafted description of a Calendar appointment.
CVSS Score
5.4
EPSS Score
0.002
Published
2023-12-21
SmarterTools SmarterMail 16.x through 100.x before 100.0.7803 allows remote code execution.
CVSS Score
9.8
EPSS Score
0.031
Published
2021-11-17
SmarterTools SmarterMail 16.x through 100.x before 100.0.7803 allows XSS.
CVSS Score
6.1
EPSS Score
0.003
Published
2021-11-17
SmarterTools SmarterMail 16.x before build 7866 has stored XSS. The application fails to sanitize email content, thus allowing one to inject HTML and/or JavaScript into a page that will then be processed and stored by the application.
CVSS Score
5.4
EPSS Score
0.003
Published
2021-09-08
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