CVE-2025-54132: Cursor's Mermaid Diagram Tool is Vulnerable to an Arbitrary Image Fetch
Cursor is a code editor built for programming with AI. In versions below 1.3, Mermaid (which is used to render diagrams) allows embedding images which then get rendered by Cursor in the chat box. An attacker can use this to exfiltrate sensitive information to a third-party attacker controlled server through an image fetch after successfully performing a prompt injection. A malicious model (or hallucination/backdoor) might also trigger this exploit at will. This issue requires prompt injection from malicious data (web, image upload, source code) in order to exploit. In that case, it can send sensitive information to an attacker-controlled external server. This is fixed in version 1.3.
Other sources
Cursor is a code editor built for programming with AI. In versions below 1.3, Mermaid (which is used to render diagrams) allows embedding images which then get rendered by Cursor in the chat box. An attacker can use this to exfiltrate sensitive information to a third-party attacker controlled server through an image fetch after successfully performing a prompt injection. A malicious model (or hallucination/backdoor) might also trigger this exploit at will. This issue requires prompt injection from malicious data (web, image upload, source code) to be exploited. In that case, it can send sensitive information to an attacker-controlled external server. GitHub created this CVE on their behalf. The documented Visual Studio updates incorporate updates in Mermaid which address this vulnerability. Please see Security Update Guide Supports CVEs Assigned by Industry Partners for more information.
— Microsoft
GitHub CVE-2025-54132: Arbitrary Image Fetch in Mermaid Diagram Tool
— Microsoft
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-54132?
CVE-2025-54132 is considered a high severity vulnerability due to its potential to exfiltrate sensitive information.
How do I fix CVE-2025-54132?
To fix CVE-2025-54132, update Cursor to version 1.3 or later to mitigate the vulnerability.
What is the impact of CVE-2025-54132?
The impact of CVE-2025-54132 allows an attacker to embed images that can exfiltrate sensitive information through the chat box.
Which versions are affected by CVE-2025-54132?
CVE-2025-54132 affects all versions of Cursor below 1.3.
Who can be affected by CVE-2025-54132?
Users of Cursor versions below 1.3 are vulnerable to CVE-2025-54132 and could have their sensitive information compromised.