WAF - WAF Release - 2025-07-14

This week’s vulnerability analysis highlights emerging web application threats that exploit modern JavaScript behavior and SQL parsing ambiguities. Attackers continue to refine techniques such as attribute overloading and obfuscated logic manipulation to evade detection and compromise front-end and back-end systems. Key Findings XSS – Attribute Overloading: A novel cross-site scripting technique where attackers abuse custom or non-standard HTML attributes to smuggle payloads into the DOM. These payloads evade traditional sanitization logic, especially in frameworks that loosely validate attributes or trust unknown tokens. XSS – onToggle Event Abuse: Exploits the lesser-used onToggle event (triggered by elements like

) to execute arbitrary JavaScript when users interact with UI elements. This vector is often overlooked by static analyzers and can be embedded in seemingly benign components. Impact These vulnerabilities target both user-facing components and back-end databases, introducing potential vectors for credential theft, session hijacking, or full data exfiltration. The XSS variants bypass conventional filters through overlooked HTML behaviors, while the obfuscated SQLi enables attackers to stealthily probe back-end logic, making them especially difficult to detect and block. Ruleset Rule ID Legacy Rule ID Description Previous Action New Action Comments Cloudflare Managed Ruleset a8918353372b4191b10684eb2aa3d845 100798 XSS - Attribute Overloading Log Block This is a New Detection Cloudflare Managed Ruleset 31dd299ba375414dac9260c037548d06 100799 XSS - OnToggle Log Block This is a New Detection