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Rewterz Threat Advisory – Fortinet FortiOS SSL VPN portal cross-site scripting Vulnerability

Severity

Medium

Analysis Summary

Fortinet FortiOS is vulnerable to cross-site scripting, caused by improper validation of user-supplied input by the SSL VPN portal. A remote authenticated attacker could exploit this vulnerability to inject malicious script into a Web page which would be executed in a victim’s Web browser within the security context of the hosting Web site, once the page is viewed. An attacker could use this vulnerability to steal the victim’s cookie-based authentication credentials.

Impact

Cross-Site Scripting

Affected Vendors

Fortinet

Affected Products

  • Fortinet FortiOS 6.2.1
  • Fortinet FortiOS 6.0.8
  • Fortinet FortiOS 5.6.12

Remediation

Refer to FortiGuard Advisory FG-IR-19-223 for patch, upgrade or suggested workaround information.

https://www.fortiguard.com/psirt/FG-IR-19-223