CVE-2017-7692

CVE Enrichment

CVSS: 8.8 HIGH
EPSS: 32.16%
EPSS Percentile: 98.32%
CISA KEV: Not listed

Description

SquirrelMail 1.4.22 (and other versions before 20170427_0200-SVN) allows post-authentication remote code execution via a sendmail.cf file that is mishandled in a popen call. It's possible to exploit this vulnerability to execute arbitrary shell commands on the remote server. The problem is in the Deliver_SendMail.class.php with the initStream function that uses escapeshellcmd() to sanitize the sendmail command before executing it. The use of escapeshellcmd() is not correct in this case since it doesn't escape whitespaces, allowing the injection of arbitrary command parameters. The problem is in -f$envelopefrom within the sendmail command line. Hence, if the target server uses sendmail and SquirrelMail is configured to use it as a command-line program, it's possible to trick sendmail into using an attacker-provided configuration file that triggers the execution of an arbitrary command. For exploitation, the attacker must upload a sendmail.cf file as an email attachment, and inject the sendmail.cf filename with the -C option within the "Options > Personal Informations > Email Address" setting.

Technical Details

CVSS Version: 3.0
CNA / NVD Source: [email protected]
Published: 20-Apr-2017 21:59
Last Modified: 17-Jun-2026 08:24
EPSS Date: 2026-11-02
CWE: CWE-20

CVSS Vector


            CVSS:3.0                            AV:N /
                            AC:L /
                            PR:L /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

Affected Products / Versions

squirrelmail / squirrelmail Source: NVD CPE · affected
Version / affected range: 1.4.22
cpe:2.3:a:squirrelmail:squirrelmail:1.4.22:*:*:*:*:*:*:*

References

Last enrichment sync: 03-Nov-2026 06:19
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

It is a proof-of-concept exploit of CVE-2017-7692, a vulnerability allowing post-authentication remote code execution within the webmail client SquirrelMail. ESET Details Webworm’s New Discord and Microsoft Graph Backdoors

Malware (4)

Threat Actors (1)

MITRE ATT&CK (15)

Vendors (6)

Products (5)

Tools (10)

Industries (1)

Countries (10)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.