Cross-Site Scripting Vulnerability in @berslucas/liljs
Summary
GHSA-c53x-wwx2-pg96: Cross-Site Scripting in @berslucas/liljs. Affects @berslucas/liljs versions < 1.0.2. Fixed in 1.0.2. How to fix ↓
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Background
The @berslucas/liljs package is an npm package that provides functionality for JavaScript templating. It allows developers to generate HTML content dynamically. However, versions prior to 1.0.2 are vulnerable to a Cross-Site Scripting (XSS) attack. This vulnerability arises from the package's use of the unsafe innerHTML function without proper input sanitization. As a result, attackers can inject and execute arbitrary JavaScript code on the victim's browser.
Vulnerability Detail
The Cross-Site Scripting (XSS) vulnerability in @berslucas/liljs allows attackers to inject malicious JavaScript code into the generated HTML content. This can lead to various security risks, such as session hijacking, defacement of web pages, and theft of sensitive user information. The vulnerability has a CVSS score of 6.5, indicating a moderate severity level. The CWE ID associated with this vulnerability is CWE-79.
How To Fix
Latest published version: 4.0.2 as of 22 Oct 2026
npm install @berslucas/liljs@4.0.2Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.0.2
This is the first release that contains the fix.
npm install @berslucas/liljs@1.0.2Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading to the latest version is not immediately feasible, developers can implement their own input sanitization before using the @berslucas/liljs package. This can involve using a library or framework that provides secure HTML escaping functions, such as the 'escape-html' module in Node.js. By properly sanitizing user input, the risk of XSS attacks can be mitigated.
Conclusion
The @berslucas/liljs package prior to version 1.0.2 is vulnerable to Cross-Site Scripting (XSS) attacks. It is crucial for developers to upgrade to the latest secure version or implement proper input sanitization to mitigate the risk of XSS vulnerabilities. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for @berslucas/liljs →
FAQ
Cross-Site Scripting (XSS) is a type of security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. This can lead to various attacks, such as stealing sensitive information or performing actions on behalf of the victim.
The @berslucas/liljs package becomes vulnerable to XSS because it uses the unsafe innerHTML function without properly sanitizing user input. This allows attackers to inject malicious scripts into the generated HTML content.
The potential consequences of this vulnerability include session hijacking, defacement of web pages, theft of sensitive user information, and the execution of arbitrary JavaScript code on the victim's browser.
Yes, upgrading to version 1.0.2 or later of the @berslucas/liljs package fixes this vulnerability. The updated version includes proper input sanitization to prevent XSS attacks.
If upgrading to the latest version is not immediately feasible, developers can implement their own input sanitization before using the @berslucas/liljs package. This involves using a library or framework that provides secure HTML escaping functions.
