CVE-2020-27224: Cross-site Scripting (XSS) in Eclipse Theia
Summary
CVE-2020-27224: Cross-site Scripting (XSS) in Eclipse Theia. Affects @theia/preview versions < 1.3.0. Fixed in 1.3.0. How to fix ↓
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Background
Eclipse Theia is an open-source extensible platform for developing multi-language cloud and desktop IDEs. It provides a rich set of APIs and services for building web-based development tools. The Markdown Preview (@theia/preview) is a component of Eclipse Theia that allows users to preview Markdown files. This vulnerability affects versions up to and including 1.2.0 of Eclipse Theia.
Vulnerability Detail
The Markdown Preview component in Eclipse Theia is susceptible to a Cross-site Scripting (XSS) vulnerability. This type of vulnerability allows an attacker to inject malicious scripts into web pages viewed by other users. In the case of Eclipse Theia, an attacker can exploit this vulnerability to execute arbitrary code, potentially leading to unauthorized access, data theft, or other malicious activities.
How To Fix
Minimum fixed version
1.3.0
This is the first release that contains the fix.
npm install @theia/preview@1.3.0Tip — 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 immediately possible, a temporary workaround is to disable or remove the Markdown Preview component from the Eclipse Theia installation. This can be done by modifying the configuration files or removing the corresponding package from the dependencies.
Conclusion
In conclusion, Eclipse Theia versions up to and including 1.2.0 are vulnerable to a Cross-site Scripting (XSS) issue in the Markdown Preview component. It is crucial to update to version 1.3.0 or later to mitigate this vulnerability. If immediate updating is not possible, disabling or removing the Markdown Preview component can serve as a temporary workaround. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for @theia/preview →
FAQ
Eclipse Theia is an open-source platform for developing web-based IDEs. It provides a rich set of APIs and services for building cloud and desktop development tools.
The Markdown Preview component is a feature of Eclipse Theia that allows users to preview Markdown files. It renders the Markdown content in a formatted and readable manner.
Cross-site Scripting (XSS) is a type of vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. This can lead to various security risks, such as unauthorized access, data theft, or the execution of arbitrary code.
This vulnerability in Eclipse Theia's Markdown Preview component can allow an attacker to execute arbitrary code. This can lead to unauthorized access to sensitive information, data manipulation, or the compromise of the entire system.
You can use Vulert's playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities, using just the package-lock.json file.
