H3C SSL VPN n/a Username Enumeration via Login Script Credential Verification

Advisories

severity: medium
date: December 30, 2025
Affecting: H3C SSL VPN 1.1
CVE: CVE-2022-50800
CWE: CWE-203 Observable Discrepancy
CVSS: 6.9
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
References: ExploitDB-50742
H3C Official Product Homepage
Zero Science Lab Disclosure (ZSL-2022-5697)
Credit: LiquidWorm as Gjoko Krstic of Zero Science Lab
Description: H3C SSL VPN contains a user enumeration vulnerability that allows attackers to identify valid usernames through the 'txtUsrName' POST parameter. Attackers can submit different usernames to the login_submit.cgi endpoint and analyze response messages to distinguish between existing and non-existing accounts.