Vulnerability · Published Aug 1, 2025 · Assigned by GitHub_M
CVE-2025-54132Cursor's Mermaid Diagram Tool is Vulnerable to an Arbitrary Image Fetch
Medium 4.4
In plain English
A medium-severity server-side request forgery in cursor from cursor. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/cursor/cursor/security/advisories/GHSA-43wj-mwcc-x93p x_refsource_CONFIRM