xss
Safeguard articles tagged "xss" — guides, analysis, and best practices for software supply chain and application security.
88 articles
What is Cross-Site Scripting (XSS)
XSS lets attackers inject malicious JavaScript into trusted pages. Learn how stored, reflected, and DOM-based XSS work, real breaches, and defenses.
react-number-format: A Security Guide for Safe Input Handling
react-number-format is a popular library for formatting numeric and masked inputs. Here is how to use it without opening XSS or validation gaps.
marked on npm: Security Review and Safe Usage
marked is a fast Markdown parser, but it does not sanitize output and older versions carried a ReDoS bug. Here is how to use marked npm without opening an XSS hole.
CVE-2021-41183: jQuery UI Datepicker XSS and How to Fix It
CVE-2021-41183 is a cross-site scripting flaw in the jQuery UI Datepicker's *Text options, fixed in 1.13.0. Here is the risk and the remediation.
DOM-Based XSS Attacks: How They Work and How to Prevent Them
A DOM based XSS attack executes entirely in the browser, which is why your server-side filters and access logs never see it. Here is how the source-to-sink flow works and what actually stops it.
JavaScript Security Best Practices Every Team Should Actually Follow
Most JavaScript security incidents come from a handful of repeated mistakes. These are the best practices that prevent them, from XSS to the npm dependency graph.
The xss npm Package: Sanitizing HTML Input Correctly
The xss npm package is a whitelist-based HTML sanitizer for Node and the browser. It works well — when you sanitize in the right place, with the right whitelist, for the right output context.
Secure Patterns for LLM Output Handling in 2026
LLM02 on the OWASP LLM Top 10 keeps quietly producing incidents because downstream systems trust model outputs they should not. Concrete patterns that hold up.
CVE-2019-8331: The Bootstrap XSS Vulnerability, Explained
CVE-2019-8331 let attackers inject script through Bootstrap's tooltip and popover template options, a pattern that recurred across several Bootstrap CVEs before 4.3.1 finally closed it.
What Is XSS? Cross-Site Scripting Full Form and Basics
XSS is short for cross-site scripting, a vulnerability that lets attackers run malicious scripts in a victim's browser. Here's how it works, its three main types, and how it's actually caught.
jQuery 3.5.1 Vulnerabilities: What Was Actually Fixed
jQuery 3.5.1 closed a second cross-site scripting hole in the htmlPrefilter regex that 3.5.0 had only partially patched — here's exactly what changed and why old jQuery bundles still trip scanners.
React Application Security Guide
Securing React applications from XSS, dependency vulnerabilities, and common frontend attack patterns.
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