CVE-2017-1000188: Cross-site Scripting Vulnerability in ejs
Summary
CVE-2017-1000188: mde ejs vulnerable to XSS. Affects ejs versions < 2.5.5. Fixed in 2.5.5. How to fix ↓
Also tracked for
- node-ejs · Debian:11
The same CVE-2017-1000188 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
ejs is an npm package used for server-side rendering of JavaScript templates. It allows developers to embed JavaScript code within HTML templates to generate dynamic content. However, versions older than 2.5.5 of ejs are vulnerable to a Cross-site Scripting (XSS) attack when using the ejs.renderFile() function. This vulnerability can lead to code injection and potential security breaches.
Vulnerability Detail
The vulnerability arises due to insufficient input sanitization in the ejs.renderFile() function. Attackers can exploit this by injecting malicious code into the template, which will be executed when the template is rendered on the server. This can result in various consequences, such as unauthorized access, data leakage, or the execution of arbitrary code.
How To Fix
Minimum fixed version
2.5.5
This is the first release that contains the fix.
npm install ejs@2.5.5Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If updating to the latest version is not feasible, a possible workaround is to manually sanitize user input before passing it to the ejs.renderFile() function. This can be done using libraries like DOMPurify or by implementing custom input validation and sanitization routines. Here's an example of using DOMPurify:
const DOMPurify = require('dompurify');
const template = '<h1><%= DOMPurify.sanitize(userInput) %></h1>';
Note that this workaround may not provide complete protection and it is still recommended to update to the latest version of ejs.
Conclusion
In conclusion, the ejs package versions older than 2.5.5 are vulnerable to a Cross-site Scripting (XSS) attack. It is crucial to update to the latest version or apply appropriate input sanitization to mitigate the risk. For further assistance and support in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for ejs →
FAQ
ejs is an npm package that enables server-side rendering of JavaScript templates. It allows developers to generate dynamic HTML content by embedding JavaScript code within templates.
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 unauthorized access, data theft, or the execution of arbitrary code.
If your application uses an older version of ejs (before 2.5.5) and utilizes the ejs.renderFile() function, it is susceptible to Cross-site Scripting (XSS) attacks. This can potentially lead to code injection and compromise the security of your application.
To fix the vulnerability, update the ejs package to version 2.5.5 or later. This can be done by running 'npm install ejs@2.5.5' in your project directory. Alternatively, you can manually sanitize user input before passing it to the ejs.renderFile() function.
If updating to the latest version is not possible, you can manually sanitize user input using libraries like DOMPurify or by implementing custom input validation and sanitization routines. However, this workaround may not provide complete protection, and it is still recommended to update to the latest version of ejs.
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