Very High . Approximately 79% of free proxies do not support HTTPS, meaning your data is transmitted in plain text and can be read or modified by the proxy owner.
: Some proxies inject malicious advertisements (malvertising) or code into the websites you visit to infect your device. Download 5260x HTTP Proxies List txt
None . Most free proxy operators log your IP address and browsing activity to sell to third parties or for malicious use. Common Dangers of Free Proxy Lists Very High