Stay informed on XSS vulnerabilities and defenses with the latest news, expert insights, and security tips on cross-site scripting threats.
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Background for this topic.
XSS, or Cross-Site Scripting, is a type of vulnerability in web applications that allows attackers to inject malicious scripts into web pages viewed by other users. This security flaw enables attackers to bypass access controls, such as the same-origin policy, which are designed to segregate different websites from each other. XSS exploits the trust a user has for a particular site, allowing the attacker to send scripts that appear to be from the site itself.
In the context of information security, XSS is a significant concern as it can be used for various malicious activities, including stealing session tokens, login credentials, or personally identifiable information; defacing websites; or redirecting users to hostile sites. Protecting against XSS requires careful coding practices, such as sanitizing user input and using security measures like Content Security Policy (CSP). Identifying and mitigating XSS vulnerabilities is crucial for maintaining the integrity and security of web applications.
Weekly headline count for the current query.
CVE-2026-42897 stems from a cross-site scripting (XSS) vulnerability and can allow an attacker to compromise Outlook Web Access (OWA) mailboxes.
On Thursday, Microsoft shared mitigations for a high-severity Exchange Server vulnerability exploited in attacks that allow threat actors to execute arbitrary code via cross-site scripting (XSS) while targeting Outlook on the web users. [...]
Microsoft has disclosed a new security vulnerability impacting on-premise versions of Exchange Server that it said has come under active exploitation in the wild