Overview
CVE-2025-33203 is a high-severity vulnerability affecting the NVIDIA NeMo Agent Toolkit UI for Web. This vulnerability is a Server-Side Request Forgery (SSRF) flaw found in the chat API endpoint. Successful exploitation allows an attacker to potentially trigger information disclosure and denial-of-service conditions.
Technical Details
The vulnerability exists within the chat API endpoint of the NeMo Agent Toolkit UI. An attacker can manipulate requests sent to this endpoint, forcing the server to make requests to unintended internal or external resources. This unauthorized access can lead to:
- Information Disclosure: The server could be coerced into revealing sensitive data from internal systems, such as configuration files, API keys, or other confidential information.
- Denial of Service (DoS): The attacker can overload internal services or exhaust resources, causing the NeMo Agent Toolkit UI or its underlying infrastructure to become unavailable.
The root cause is insufficient input validation and sanitization within the chat API endpoint, allowing attackers to control the destination of server-side requests.
CVSS Analysis
This vulnerability has been assigned a CVSS score of 7.6 (HIGH).
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H (Example vector – consult NVD for definitive vector)
- Explanation: Network access is required, the attack complexity is low, no privileges are needed, user interaction is required, scope is unchanged, high confidentiality impact, no integrity impact, and high availability impact.
Possible Impact
The potential impact of exploiting CVE-2025-33203 is significant:
- Data Breach: Exposure of sensitive information stored within the affected systems.
- Service Disruption: Denial-of-service attacks can interrupt critical operations relying on the NeMo Agent Toolkit UI.
- Lateral Movement: In some cases, a successful SSRF attack can be a stepping stone for further compromising the internal network.
- Reputational Damage: A successful attack can damage the reputation of the organization using the vulnerable software.
Mitigation and Patch Steps
NVIDIA has released a patch to address this vulnerability. Users of the NVIDIA NeMo Agent Toolkit UI for Web are strongly advised to take the following steps:
- Apply the Latest Security Patch: Download and install the latest security update for the NeMo Agent Toolkit UI from the NVIDIA support website.
- Network Segmentation: Implement network segmentation to restrict access between the NeMo Agent Toolkit UI and internal resources.
- Input Validation: Enforce strict input validation and sanitization on all user-supplied data, especially within the chat API endpoint. This should include whitelisting allowed destination hosts and protocols.
- Web Application Firewall (WAF): Utilize a WAF to detect and block malicious requests targeting the SSRF vulnerability.
- Monitor Network Traffic: Monitor network traffic for suspicious activity, such as unusual requests originating from the NeMo Agent Toolkit UI server.
Refer to the NVIDIA security advisory for detailed instructions on applying the patch.
References
NVD – CVE-2025-33203
NVIDIA Security Advisory
CVE – CVE-2025-33203
