Protect Your Liferay Portal from Cross-Site Scripting Attacks

CVSScvssV3_1: 9

Liferay Portal is an open source web content management and collaboration platform. Unfortunately, a stored cross-site scripting (XSS) vulnerability was discovered in its Dynamic Data Mapping module that could allow remote authenticated attackers to inject malicious scripts.

Stored XSS occurs when user-supplied data is rendered without being sanitized. In this case, the instanceId parameter was not properly validated before being reflected back to users. A malicious actor could craft a specially crafted ID containing JavaScript that would be executed by other users’ browsers when they viewed the affected pages.

This would allow the attacker to steal users’ session cookies or passwords, modify page content, redirect users to malicious sites, and perform other unwanted actions on the vulnerable system. They could even spread the attack to other sites if the injected script included social media sharing buttons or links.

To protect yourself, Liferay users should ensure they apply the latest updates and security patches to close this vulnerability. Administrators should also implement input validation and output encoding to prevent stored XSS attacks. Users should be cautious of unexpected changes to websites and avoid following untrusted links or downloading suspicious files.

By keeping your Liferay Portal installation up-to-date and practicing safe browsing habits, you can help prevent attackers from exploiting this stored XSS flaw and compromising your account or system. Staying vigilant about application and plugin security is important for protecting your data and online activities.