CVE-2018-18370

Severity: medium (CVSS 6.1 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-08-30 · updated 2026-06-17
Weakness: CWE-79

Description

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; 6.6 — fixed in 6.7.4.2
Symantec Corporation ProxySG: from 6.5 before 6.5.10.15; from 6.7 before 6.7.4.2; 6.6 — fixed in 6.5.10.15, 6.7.4.2

How to fix

Upgrade to a fixed version: Broadcom Advanced Secure Gateway 6.7.4.2; Symantec Corporation ProxySG 6.5.10.15, 6.7.4.2. Check the vendor advisory for mitigations.

References

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