EUVD-2024-2830

Comprehensive Technical Analysis of EUVD-2024-2830

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: Flowise versions prior to 2.1.1 are affected by a Stored Cross-Site Scripting (XSS) vulnerability. This issue arises due to insufficient input sanitization in the Flowise Chat Embed component versions below 2.0.0.

Severity Evaluation: The vulnerability has a CVSS base score of 9.6, which is classified as critical. The CVSS vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H indicates the following:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): None (N)
• User Interaction (UI): Required (R)
• Scope (S): Changed (C)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

This high severity score underscores the potential for significant impact on confidentiality, integrity, and availability of the affected systems.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Stored XSS: An attacker can inject malicious scripts into the Flowise Chat Embed component. These scripts are stored on the server and executed by other users who interact with the affected component.
• Phishing: Attackers can use the stored XSS vulnerability to create convincing phishing attacks, redirecting users to malicious sites or stealing their credentials.
• Session Hijacking: Malicious scripts can steal session cookies, allowing attackers to hijack user sessions.

Exploitation Methods:

• Script Injection: Attackers can inject JavaScript code into input fields that are not properly sanitized.
• Payload Delivery: The injected scripts can be designed to perform various malicious actions, such as data exfiltration, keylogging, or further exploitation of the system.

3. Affected Systems and Software Versions

Affected Software:

• Flowise: Versions prior to 2.1.1
• Flowise Chat Embed: Versions prior to 2.0.0

Affected Systems:

• Any system running the vulnerable versions of Flowise and Flowise Chat Embed.
• Web applications and services that integrate the Flowise Chat Embed component.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Software: Upgrade to Flowise version 2.1.1 or later and Flowise Chat Embed version 2.0.0 or later.
• Input Sanitization: Ensure all user inputs are properly sanitized and validated to prevent script injection.
• Content Security Policy (CSP): Implement a strong CSP to mitigate the impact of XSS attacks.

Long-Term Strategies:

• Regular Security Audits: Conduct regular security audits and code reviews to identify and fix vulnerabilities.
• User Education: Educate users about the risks of phishing and other social engineering attacks.
• Monitoring and Logging: Implement robust monitoring and logging to detect and respond to potential attacks quickly.

5. Impact on European Cybersecurity Landscape

Regulatory Compliance:

• Organizations must ensure compliance with GDPR and other relevant regulations to protect user data.
• Failure to address this vulnerability could result in data breaches, leading to regulatory fines and reputational damage.

Cybersecurity Posture:

• The vulnerability highlights the importance of input validation and sanitization in web applications.
• European organizations should prioritize security best practices and regular updates to maintain a strong cybersecurity posture.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2024-9148
• GHSA ID: GHSA-m5p9-xvxj-64c8
• Assigner: Tenable

References:

• NVD Detail
• Flowise GitHub Commit
• Flowise Chat Embed GitHub Commit
• Flowise Release 2.1.1
• Flowise Chat Embed Release 2.0.0
• Tenable Security Research

ENISA IDs:

• Product: FlowiseChatEmbed, versions < 2.0.0
• Vendor: FlowiseAI

Conclusion: The Stored XSS vulnerability in Flowise and Flowise Chat Embed poses a significant risk to organizations using these components. Immediate action is required to update the software and implement robust security measures to mitigate the risk. Regular security audits and user education are essential to maintain a strong cybersecurity posture in the European landscape.