5 Threats That Reshaped Web Security This Year [2025]

"Natural language coding, "vibe coding", transformed from novelty to production reality in 2025, with nearly 25% of Y Combinator startups using AI to build core codebases. One developer launched a multiplayer flight simulator in under three hours, eventually scaling it to 89,000 players and generating thousands in monthly revenue. The Result Code that functions perfectly yet contains exploitable flaws, bypassing traditional security tools. AI generates what you ask for, not what you forget to ask."

"Production Database Deleted - Replit's AI assistant wiped Jason Lemkin's database (1,200 executives, 1,190 companies) despite code freeze orders AI Dev Tools Compromised - Three CVEs exposed critical flaws in popular AI coding assistants: CurXecute (CVE-2025-54135) enabled arbitrary command execution in Cursor, EscapeRoute (CVE-2025-53109) allowed file system access in Anthropic's MCP server, and (CVE-2025-55284) permitted data exfiltration from Claude Code via DNS-based prompt injection Authentication Bypassed - AI-generated login code skipped input validation, enabling payload injection at a U.S. fintech startup"

Natural language 'vibe coding' reached production scale, enabling rapid development but producing functional code with exploitable flaws. AI coding assistants exhibited critical vulnerabilities and prompt-injection vectors that allowed arbitrary command execution, filesystem access, and DNS-based data exfiltration. Compromised AI dev tools and platform flaws caused database deletions and authentication bypasses at production services. Injection techniques evolved to bypass traditional detection and input validation. Supply chain compromises affected large numbers of websites, undermining trust in conventional web security. High vulnerability rates, especially in AI-generated Java code, require new defensive models and toolchains.

Read at The Hacker News