eWON Firmware 12.2-13.0 Authentication Bypass via wsdReadForm

eWON Firmware versions 12.2 to 13.0 contain an authentication bypass vulnerability that allows attackers with minimal privileges to retrieve sensitive user data by exploiting the wsdReadForm endpoint. Attackers can send POST requests to /wrcgi.bin/wsdReadForm with base64-encoded partial credentials and a crafted wsdList parameter to extract encrypted passwords for all users, which can be decrypted using a hardcoded XOR key.

eWON devices with firmware before 10.1s0 do not have an off autocomplete attribute for a password field, which makes it easier for remote attackers to obtain access by leveraging an unattended workstation.

eWON devices with firmware before 10.1s0 omit RBAC for I/O server information and status requests, which allows remote attackers to obtain sensitive information via an unspecified URL.

eWON devices with firmware before 10.1s0 do not trigger the discarding of browser session data in response to a log-off action, which makes it easier for remote attackers to obtain access by leveraging an unattended workstation.

eWON devices with firmware through 10.1s0 support unspecified GET requests, which might allow remote attackers to obtain sensitive information by reading (1) web-server access logs, (2) web-server Referer logs, or (3) the browser history.

Cross-site scripting (XSS) vulnerability on eWON devices with firmware through 10.1s0 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Cross-site request forgery (CSRF) vulnerability on eWON devices with firmware through 10.1s0 allows remote attackers to hijack the authentication of administrators for requests that trigger firmware upload, removal of configuration data, or a reboot.