CVE-2025-54132

High7.5

Cursor's Mermaid Diagram Tool is Vulnerable to an Arbitrary Image Fetchtitle from the CVE record

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.

CVSS: 7.5v3.1
EPSS (exploit probability): 0.4%32th pct
CISA KEV: Not listed

EPSS trendFIRST daily scores, last 90 days

2026-09-25 → 2026-10-26 · 31 days · 0.4%–0.4%

Daily values

FIRST EPSS daily scores for this CVE
Score date	EPSS	Percentile
2026-10-26	0.4%	32.1%
2026-10-25	0.4%	32.0%
2026-10-24	0.4%	31.2%
2026-10-23	0.4%	31.1%
2026-10-22	0.4%	31.1%
2026-10-21	0.4%	27.4%
2026-10-20	0.4%	27.3%
2026-10-19	0.4%	27.2%
2026-10-18	0.4%	27.2%
2026-10-17	0.4%	27.2%
2026-10-16	0.4%	27.1%
2026-10-15	0.4%	27.1%
2026-10-14	0.4%	27.0%
2026-10-13	0.4%	26.9%
2026-10-12	0.4%	26.8%
2026-10-11	0.4%	26.8%
2026-10-10	0.4%	26.7%
2026-10-09	0.4%	26.7%
2026-10-08	0.4%	26.6%
2026-10-07	0.4%	26.6%
2026-10-06	0.4%	26.5%
2026-10-05	0.4%	26.4%
2026-10-04	0.4%	26.4%
2026-10-03	0.4%	26.4%
2026-10-02	0.4%	26.4%
2026-10-01	0.4%	26.3%
2026-09-30	0.4%	26.3%
2026-09-29	0.4%	26.2%
2026-09-27	0.4%	26.2%
2026-09-26	0.4%	26.1%
2026-09-25	0.4%	26.0%