Cross-Site Scripting Vulnerability in Smoothwall Express by Smoothwall
CVE-2019-25378

5.1MEDIUM

Key Information:

Vendor

Smoothwall

Status
Smoothwall Express
Vendor
CVE Published:
16 February 2026

Badges

👾 Exploit Exists

What is CVE-2019-25378?

Smoothwall Express 3.1-SP4-polar-x86_64-update9 is susceptible to multiple cross-site scripting vulnerabilities in the proxy.cgi endpoint. These vulnerabilities enable attackers to inject malicious scripts via parameters such as CACHE_SIZE, MAX_SIZE, MIN_SIZE, MAX_OUTGOING_SIZE, and MAX_INCOMING_SIZE. By sending crafted POST requests containing script payloads, an attacker can store or reflect arbitrary JavaScript code. This code executes in the browsers of users who access the proxy configuration page, potentially compromising user data and security.

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Affected Version(s)

Smoothwall Express 3.1

References

https://www.exploit-db.com/exploits/46333
exploit
http://www.smoothwall.org
product
https://www.vulncheck.com/advisories/smoothwall-express-p...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ozer Goker
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