The current US administration is an obstacle, but public demand for protection will ultimately prevail

Organisations around the world scrambled on Thursday to fix critical flaws in PHP, the software that powers much of the web. The vulnerabilities could allow attackers to take control of affected servers. Some websites were taken offline as a precaution while fixes were installed. The paradox is that while AI helped researchers uncover the flaw, it also threatens to accelerate the ability to exploit it. Amazon said that it had detected an attempt before the public disclosure of the PHP flaws.

What the episode highlights is AI’s central role in security – and not always for the right reasons. OpenAI’s models have also been responsible for two alarming hacks this year – a security breach of an Australian health department website and a raid by a swarm of AI bots on Hugging Face, an AI services platform. Citing those incidents, the AI minister, Kanishka Narayan, warned that a similar cyber-attack on the UK is “likely, if not inevitable”.

Problem in language that underpins 70% of sites has led governments and companies to pull sites offline to patch fault

• Tell us: have you been affected by the PHP code flaw?

• What is PHP, and how bad is the computer language flaw causing website shutdowns globally?

Websites around the world have been hit by millions of attempts to exploit a recently discovered vulnerability in their code, cybersecurity companies have said, as the US warned the flaw could allow attackers to take control of web servers, steal data and disrupt services.

The problem in the PHP programming language, which underpins about 70% of the world’s websites, emerged on Wednesday causing governments and companies to pull their websites off the internet before they could be attacked and so they could patch the fault.

An estimated 70% of websites use the open-source language. What is the identified vulnerability in it?

Website owners faced millions of attempts to exploit a serious security vulnerability in their programming language, it has emerged, triggering a rush by governments and businesses to fix the problem.

The newly discovered vulnerabilities in PHP, a programming language that underpins most websites, allows hackers to carry out cyber-attacks and steal data if not fixed. What were the vulnerabilities and why did they affect so many sites?

Precautionary takedowns come as experts say bad actors could exploit vulnerability in language used by 70% of sites

Websites around the globe have gone dark after a serious vulnerability was found in a computer language used to build much of the world wide web.

Belgian, Dutch, Finnish, French and German sites were among those that governments took down temporarily as they scrambled to patch the critical weakness in PHP, a language used by almost 70% of websites.