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

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.

H3C SSL VPN through 2022-07-10 allows wnm/login/login.json svpnlang cookie XSS.