Plateforme
nodejs
Composant
@theia/preview
Corrigé dans
1.2.1
1.3.0
CVE-2020-27224 describes a Cross-Site Scripting (XSS) vulnerability affecting Eclipse Theia versions up to 1.2.0. This flaw allows attackers to inject and execute malicious scripts within the Markdown Preview component, potentially leading to unauthorized access and control. The vulnerability was published on April 13, 2021, and a fix is available in version 1.3.0.
The impact of this XSS vulnerability is significant. An attacker could leverage it to steal user credentials, inject malicious code into the IDE environment, or even gain complete control over the user's session. This could lead to data breaches, compromise of sensitive code, and disruption of development workflows. The Markdown Preview component is commonly used for displaying documentation and notes within Theia, making it a prime target for exploitation. Successful exploitation could allow an attacker to impersonate a legitimate user, execute arbitrary commands, and potentially compromise the entire development environment.
CVE-2020-27224 is not currently listed on the CISA KEV catalog. Public proof-of-concept (PoC) exploits are available, indicating a moderate risk of exploitation. The vulnerability's ease of exploitation, combined with the widespread use of Eclipse Theia in development environments, makes it a potential target for attackers.
Developers and organizations utilizing Eclipse Theia for IDE development, particularly those relying on the Markdown Preview component for documentation or note-taking, are at risk. This includes teams using Theia for custom development environments and those who have not yet upgraded to the latest version.
• nodejs / supply-chain: Monitor for suspicious JavaScript code execution within the Markdown Preview component. Use Node.js process monitoring tools to detect unusual activity.
Get-Process -Name theia | Select-Object -ExpandProperty Path• generic web: Inspect HTTP requests and responses for signs of XSS payloads being injected into the Markdown Preview. Check for unusual script tags or event handlers.
curl 'http://your-theia-instance/preview' | grep -i '<script>' discovery
disclosure
patch
Statut de l'Exploit
EPSS
0.90% (percentile 76%)
Vecteur CVSS
The primary mitigation for CVE-2020-27224 is to upgrade Eclipse Theia to version 1.3.0 or later, which contains the fix for this vulnerability. If upgrading is not immediately feasible, consider implementing input validation and sanitization on any user-supplied data used in the Markdown Preview. Web Application Firewalls (WAFs) configured to detect and block XSS payloads can also provide a temporary layer of protection. Regularly review and update Theia's dependencies to minimize the risk of future vulnerabilities.
Actualice Eclipse Theia a una versión posterior a la 1.2.0. Esto solucionará la vulnerabilidad de ejecución de código arbitrario en la vista previa de Markdown.
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CVE-2020-27224 is a critical Cross-Site Scripting (XSS) vulnerability in Eclipse Theia versions up to 1.2.0, allowing attackers to execute arbitrary code via the Markdown Preview component.
Yes, if you are using Eclipse Theia versions prior to 1.3.0, you are vulnerable to this XSS attack. Check your version and upgrade immediately.
Upgrade Eclipse Theia to version 1.3.0 or later to patch this vulnerability. Ensure all dependencies are also up-to-date.
While there's no confirmed widespread exploitation, public proof-of-concept exploits exist, indicating a potential risk.
Refer to the Eclipse Foundation security page for details: https://www.eclipse.org/security/advisories/
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