CVE-2021-42839

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.

• CWE-434

• https://www.twcert.org.tw/tw/cp-132-5288-9d546-1.htmlThird Party Advisory
• https://www.twcert.org.tw/tw/cp-132-5288-9d546-1.htmlThird Party Advisory

Published

Nov 15, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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