CVE-2018-18370: Broadcom Advanced Secure Gateway

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

The ASG/ProxySG FTP proxy WebFTP mode allows intercepting FTP connections where a user accesses an FTP server via a ftp:// URL in a web browser. A stored cross-site scripting (XSS) vulnerability in the WebFTP mode allows a remote attacker to inject malicious JavaScript code in ASG/ProxySG's web listing of a remote FTP server. Exploiting the vulnerability requires the attacker to be able to upload crafted files to the remote FTP server. Affected versions: ASG 6.6 and 6.7 prior to 6.7.4.2; ProxySG 6.5 prior to 6.5.10.15, 6.6, and 6.7 prior to 6.7.4.2.

Affected products

• Broadcom Advanced Secure Gateway: from 6.7, before 6.7.4.2 (fixed in 6.7.4.2); version 6.6 only
• Broadcom Symantec Proxysg: from 6.5, before 6.5.10.15 (fixed in 6.5.10.15); from 6.7, before 6.7.4.2 (fixed in 6.7.4.2); version 6.6 only

Published 2019-08-30. Last modified 2026-06-17.