An XSS attack is the actual, real-world exploitation of a cross-site scripting vulnerability — an attacker successfully injecting and running malicious code within a legitimate website, targeting the site's own visitors rather than the site's server infrastructure directly.
Real-World Consequences of a Successful XSS Attack
- Stealing a visitor's session cookies, potentially hijacking their account
- Redirecting visitors to an entirely different, malicious website
- Displaying fake login forms designed specifically to steal credentials
- Spreading malware directly to unsuspecting site visitors
Why WordPress Sites Are Frequently Targeted
- WordPress's massive install base makes it a genuinely attractive, high-value target for attackers
- Outdated plugins and themes are a common, well-documented source of exploitable vulnerabilities
- Comment sections and other user-input fields, if left unprotected, create real opportunities for injection
Responding to a Successful XSS Attack
- Identify and properly patch the specific vulnerability that allowed the attack to succeed
- Restore from a clean, verified backup taken before the compromise occurred
- Change every single password and API key associated with the site
- Scan thoroughly to confirm no remaining malicious code is still present anywhere on the site