Vue 2.5.21 is a minor version update to the popular JavaScript framework, building upon version 2.5.20. Both versions maintain the core focus of providing a reactive, component-oriented view layer ideal for modern web interfaces. Examining the package data reveals that the primary differences lie in the distribution details and release dates. While both versions share the same list of development dependencies, suggesting no significant changes in the tooling or build process, Vue 2.5.21 has a slightly larger unpacked size (3,266,961 bytes) compared to Vue 2.5.20 (3,266,142 bytes). This minor size difference typically indicates small bug fixes, performance improvements, or internal adjustments rather than major feature additions.
For developers, upgrading from 2.5.20 to 2.5.21 should be a straightforward process, as both versions are API-compatible. The newer version likely includes essential patches and refinements that enhance stability and potentially improve rendering efficiency. Given the established nature of the 2.5.x series, developers can expect continued support and a mature ecosystem. While specific change logs would provide more detailed information on the exact modifications, the update generally represents a recommended step for maintaining a healthy and optimized Vue application. Always consult the the official Vue.js documentation for the most accurate and up-to-date information for the release changelog.
All the vulnerabilities related to the version 2.5.21 of the package
ReDoS vulnerability in vue package that is exploitable through inefficient regex evaluation in the parseHTML function
The ReDoS can be exploited through the parseHTML function in the html-parser.ts file. This flaw allows attackers to slow down the application by providing specially crafted input that causes inefficient processing of regular expressions, leading to excessive resource consumption.
To demonstrate this vulnerability, here's an example. In a Vue client-side application, create a new Vue instance with a template string that includes a <script> tag but closes it incorrectly with something like </textarea>.
new Vue({
el: '#app',
template: '
<div>
Hello, world!
<script>${'<'.repeat(1000000)}</textarea>
</div>'
});
Next, set up a basic HTML page (e.g., index.html) to load this JavaScript and mount the Vue instance:
<!DOCTYPE html>
<html>
<head>
<title>My first Vue app</title>
</head>
<body>
<div id=\"app\">Loading...</div>
</body>
</html>
When you visit the app in your browser at http://localhost:3000, you'll notice that the time taken to parse and mount the Vue application increases significantly due to the ReDoS vulnerability, demonstrating how the flaw can affect performance.