Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via the cleanupXss function when sanitizing HTML content with conflicting htmLawed configuration options. An attacker can execute arbitrary JavaScript in the context of the affected application by injecting...

CVE-2026-33979 Express XSS Sanitizer: allowedTags/allowedAttributes bypass leads to permissive sanitization (XSS risk)

Express XSS Sanitizer is Express 4.x and 5.x middleware which sanitizes user input data in req.body, req.query, req.headers and req.params to prevent Cross Site Scripting XSS attack. A vulnerability has been identified in versions prior to 2.0.2 where restrictive sanitization configurations are...