A global cybersecurity alert has been issued after artificial intelligence uncovered severe, long-standing vulnerabilities in PHP, a programming language fundamental to a vast number of websites.

The flaws, which had gone undetected for over a decade, were brought to light by AI technology, prompting governments and cybersecurity agencies worldwide to scramble for containment. Website operators have been urged to apply an emergency fix or temporarily disable their platforms.

Cybersecurity firm Wiz, whose researchers utilized AI to identify the issues, described the vulnerabilities as the most severe ever detected by AI. OpenAI, the creator of the AI technology used, characterized the discovery as one of the most impactful security issues in recent memory.

The implications are significant, as PHP, or Hypertext Preprocessor, powers many familiar platforms, including online retailers, Wikipedia, and WordPress, which underpins numerous blogs and websites. Experts warn that attackers could potentially gain control of affected web servers without authorization, leading to the theft of sensitive data.

These vulnerabilities could affect millions of websites, with AI potentially accelerating the speed and ease with which attacks can be mounted. Cybersecurity experts have voiced concerns that nation-states or malicious actors could weaponize these flaws to seize private data on a massive scale.

In response to the discovery, developers of the PHP platform released emergency patches on Wednesday to address the vulnerabilities. Website operators are strongly advised to update their systems immediately to mitigate the risks.

The alert has already caused disruptions, with various services globally, from gaming platforms to government portals, experiencing outages. Organizations such as Wikimedia, the operator of Wikipedia, took precautionary measures by disabling several systems. The Finnish government, Edinburgh council, the BBC, and the Netherlands' cybersecurity agency are among those that have taken websites offline.

Some experts are particularly concerned about the increased risk to poorly maintained websites, especially those belonging to smaller organizations with limited cybersecurity resources. The public release of technical details regarding the flaws is expected to lead to a surge in exploitation attempts in the coming weeks.