Posts Tagged: owasp

• Flask-Login Session Fixation Vulnerability: How to Regenerate Session IDs After Login

  Flask-Login session fixation vuln: No auto session ID regen post-login → attacker hijacks via pre-auth session fixation (OWASP A5). Fix: session.regenerate() after login_user(). Code, audit, tests. Benchmarks: 0 vuln → secure.

  Mar 15, 2026

  flaskflask-loginsecuritysession-fixationowaspsession-regenerationvulnerabilitypython

• Implementing Content Security Policy (CSP) Headers in Flask to Prevent XSS

  Implement CSP headers in Flask using @after_request, nonces, and report-only mode to mitigate XSS risks. Covers directives, common violations, and verification.

  Mar 15, 2026

  flaskcspcontent-security-policyxsssecurityheadersowasppythonweb-security