Researchers have identified a serious vulnerability in PHP, the scripting language that powers over 70% of all sites worldwide. If not remedied promptly, the weakness could let attackers seize control of, and jeopardize, millions of websites and the data stored on their servers across the internet today.
The Australian Signals Directorate, America’s Cyber Defence Agency, and similar bodies from the United Kingdom, Europe, and Japan have warned web developers to apply urgent updates to their core systems and consider taking down websites until safety can be guaranteed.
PHP is often referred to as “the backbone of the web” due to its versatility in managing user inputs and processing information behind the scenes. It is used for everything from logging users into accounts and running online stores to requesting data from databases and powering millions of blog posts and news sites.
Discovery of the Flaw
In August, cybersecurity researchers from Wiz used their own tools and the latest versions of Google’s Gemini and OpenAI’s ChatGPT AI models to trawl through PHP’s massive codebase. They were searching for hidden programming weaknesses that an attacker could exploit to take over a system running PHP.
Within a few days, the Wiz team found ways to break into PHP-powered systems from Drupal and WordPress, which are used in huge swathes of the web. They contacted the PHP security team to let them know about the flaws they had found.
Response to the Flaw
By late September, the PHP developers confirmed that the issue existed and quietly began working on a fix. However, a user on popular industry website Hacker News let news slip about the security flaws before any patches were ready, prompting PHP’s developers to rush to publicly confirm the issue and release emergency patches ahead of schedule.
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Implementing the patches is far from simple due to the complexity of the web’s infrastructure. Because PHP sits underneath thousands of third-party plugins, frameworks, and managed hosting services, websites are only secure once every individual layer of the supply chain integrates and deploys the PHP fix.
Broader Implications
Much of the internet is built on foundational technologies that were developed and maintained by hobbyist developers, relying on goodwill and donations rather than robust corporate funding. Many of these tools were first developed decades ago and were never designed to safely support a world where millions of websites and billions of devices use them to handle sensitive and private data.
This issue highlights the need for businesses and governments to prioritize the resilience of their digital supply chains. Gathering information about the systems and frameworks they depend on is the first step towards truly understanding how heavily their digital viability relies on underfunded, volunteer-maintained code.
Cybersecurity teams around the world are rushing to contain the damage, and major cloud providers and security firms are rolling out emergency filters. However, the global scramble to secure the web is just beginning, and it should serve as a wake-up call for the importance of securing digital infrastructure.
For everyday internet users, these vulnerabilities affect the servers hosting websites rather than personal devices. Nevertheless, it is wise to be cautious about entering sensitive personal data on unfamiliar websites over the next few days until the situation is fully resolved.
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