Companies House forced a company to change its name after realizing it posed a security risk due to the use of HTML script tags. The company, now named “THAT COMPANY WHOSE NAME USED TO CONTAIN HTML SCRIPT TAGS LTD”, used a clever technique called “cross-site scripting” that could potentially allow an attacker to run code on other websites. This incident led to the company’s original name being removed from public records. The director of the company was surprised by the response, thinking the playful name wouldn’t be an issue. Companies House has since taken steps to prevent future occurrences and ensure the security of their services.
https://www.theguardian.com/uk-news/2020/nov/06/companies-house-forces-business-name-change-to-prevent-security-risk