XSS Testing Services

XSS attacks take advantage of insufficient input validation on web applications. When user input isn’t properly sanitized, malicious scripts can be injected into the application code and executed on the browsers of other users.

Some common attack vectors criminals use include:

• Stored XSS. With this attack, the malicious payloads get stored permanently on the target servers, such as in a database.
• Reflected XSS. Reflected XSS works a bit differently and relies on social engineering trickery. The attacker crafts a malicious link containing the XSS payload and finds some way to convince victims to click it.
• DOM-based XSS. This type of attack is interesting because there’s no vulnerability on the server itself. Instead, the weakness lies in the website’s client-side JavaScript code that modifies the document object model (DOM).

XSS has evolved into different forms, each posing unique risks and challenges for testing and protection. A layered defense incorporating robust scanning, penetration testing, remediation, and developer training is crucial.

XSS might seem innocuous at first glance, but successful exploits can create all kinds of costly headaches:

• Session hijacking. One of the most common goals is to steal login cookies and take over user accounts.
• UI redressing. The page layout can be altered to fool victims into entering sensitive data.
• Defacement. The website’s look can be changed for pranks or fraud.
• Malware injection. Downloading malicious programs onto visitor devices opens up even more attacks.
• Data theft. Personal, financial, or proprietary data exfiltration can have dramatic consequences.

Failure to adequately test and protect against XSS attacks can have cascading consequences across customers, partners, and entire industries.

XSS flaws allow attackers to steal virtually any data handled by the web application. Our experts identify vulnerabilities before they can be exploited to harvest sensitive user data, including credentials, personal information, financial data, and more.

Our layered testing approach finds weaknesses at every level, plugging the holes attackers could leverage to take over user accounts, deface sites, install malware, and more.

Businesses that invest in XSS tests demonstrate their commitment to security and protecting their customers. Identifying and fixing vulnerabilities before software releases reduces the brand damage caused by high-profile breaches.

Our team conducts thorough hands-on testing to uncover hard-to-find XSS vulnerabilities that automated scanners miss. Our manual testing services bring a true attacker perspective to your web security assessments.

Our automated XSS testing tools provide rapid vulnerability probing at a massive scale across your web applications and APIs. This way, we can quickly test thousands of inputs to baseline potential flaws for manual verification. Automation mapped to our methodology increases coverage and saves manual labor on basic tests.

This type of testing is done from an external attacker’s perspective without knowledge of or access to the application’s internal code and infrastructure. Black box testing simulates real attacks.

Gray box testing represents a valuable middle ground between completely blind black and full transparency white box testing. With gray box testing, our experts are provided with partial internal knowledge of your web application’s inner workings while still approaching it from an external perspective.