CVE-2021-42839: Vice Webopac

High severity, CVSS 8.8. EPSS: 2.4% chance of exploitation in the next 30 days.

Grand Vice info Co. webopac7 file upload function fails to filter special characters. While logging in with general user’s permission, remote attackers can upload malicious script and execute arbitrary code to control the system or interrupt services.

Affected products

• Vice Webopac: version 1.8.20160701 only; version 7.1.20160701 only

Published 2021-11-15. Last modified 2026-06-17.