Multiple one-click client-site vulnerabilities were found by independent security researcher Paulos Yibelo, who discovered roughly a dozen serious security vulnerabilities in Bluehost, Dreamhost, HostGator, OVH, and iPage, which together amount to roughly 7 million domains. These vulnerabilities, which will be detailed below, could have put millions of their customers as well as billions of their sites’ visitors at risk of hacking.
Some of these vulnerabilities are so simple to execute and was demonstrated by hackers who simply tricked victims into clicking a simple link or visiting a malicious website that would easily take over the accounts of anyone using the affected hosting providers.
The research
The researcher Paulos Yibelo documented [Click here] on the website Planet Blog his findings, finding several account takeover, cross-scripting, and information disclosure vulnerabilities.
1. Bluehost—the company owned by Endurance which also owns Hostgator and iPage, and in total, the three hosting providers powers more than 2 million sites around the world. Bluehost was found vulnerable to:
- Information leakage through cross-origin-resource-sharing (CORS) misconfigurations
- Account takeover due to improper JSON request validation CSRF
- A Man-in-the-middle attack can be performed due to improper validation of CORS scheme
- Cross-site scripting flaw on my.bluehost.com allows account takeover (demonstrated in a proof-of-concept, below)
2. Dreamhost—the hosting provider that powers one million domains was found vulnerable to:
- Account takeover using cross-site scripting (XSS) flaw
3. HostGator
- Site-wide CSRF protection bypass allows complete control
- Multiple CORS misconfigurations leading to information leak and CRLF
4. OVH Hosting—the company that alone powers four million domains around the world was found vulnerable to:
- CSRF protection bypass
- API misconfigurations
5. iPage Hosting
- Account takeover flaw
- Multiple Content Security Policy (CSP) bypasses
Video Demonstrations By BlueHost
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