What’s Vulnerable › Vulnerabilities

CVE-2019-25394: Smoothwall Express 3.1 'modem.cgi' Cross-Site Scripting

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-16 · updated 2026-06-17
• Weakness: CWE-79

Description

Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains multiple stored cross-site scripting vulnerabilities in the modem.cgi script that allow attackers to inject malicious scripts through POST parameters. Attackers can submit crafted payloads in parameters like INIT, HANGUP, SPEAKER_ON, SPEAKER_OFF, TONE_DIAL, and PULSE_DIAL to execute arbitrary JavaScript in users' browsers when the stored data is retrieved.

Affected products

• Smoothwall Express: 3.1-sp4

References

• http://www.smoothwall.org
• https://www.exploit-db.com/exploits/46333
• https://www.vulncheck.com/advisories/smoothwall-express-modemcgi-cross-site-scripting

Get alerted when CVE-2019-25394 or the next vulnerability affects your stack