Why in News?
- In October 2026, critical security vulnerabilities in PHP, a programming language widely used to build websites, triggered emergency cybersecurity measures worldwide.
- Governments, banks and businesses temporarily took some websites and online services offline to prevent potential cyberattacks while security patches were applied.
- Cybersecurity firm Cloudflare reported a sharp rise in attempted exploitation, reaching millions of attempts.
Prelims Pointers
1. PHP (Hypertext Preprocessor)
- An open-source, general-purpose scripting language widely used for web development.
- Primarily executes on the server side to generate dynamic web pages.
- Used by content management systems, e-commerce platforms and government websites.
- WordPress is a prominent example of software built using PHP.
2. Software Vulnerability
- A weakness or flaw in software that an attacker may exploit to compromise a system.
- Vulnerabilities can result in unauthorised access, data theft, service disruption or system takeover.
- A security patch is an update released to fix a vulnerability.
3. Remote Code Execution (RCE)
- A cyberattack in which an attacker can execute commands or code on a remote computer.
- If exploited successfully, it may enable an attacker to access data, alter website content or gain control of a server.
- The reported PHP flaws were rated critical because of the potential for unauthenticated remote code execution.
Important Cybersecurity Terms
| Term | Meaning |
| Zero-day vulnerability | A software flaw exploited before an effective fix is available to affected users. |
| CVE | Common Vulnerabilities and Exposures — a system for identifying publicly disclosed cybersecurity vulnerabilities. |
| CERT-In | Indian Computer Emergency Response Team; the national agency for responding to cybersecurity incidents in India. |
| AI in cybersecurity | AI can help detect hidden vulnerabilities, but attackers can also use AI to develop or scale exploits. |
| Critical Information Infrastructure (CII) | Essential systems whose disruption can seriously affect national security, the economy, public health or safety. |
UPSC Prelims Practice Questions
Q1. With reference to PHP, consider the following statements:
- It is an open-source scripting language.
- It is widely used for server-side web development.
- It is exclusively a client-side programming language.
Which of the statements given above are correct?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Answer: (a) 1 and 2 only
Explanation: PHP is an open-source scripting language commonly used to process requests and generate dynamic content on web servers. It is not exclusively a client-side language.
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