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Attributed metadata history

REPORTPUBLIC METADATA

Cursor IDE: Arbitrary Data Exfiltration Via Mermaid (CVE-2025-54132)

Cursor is a popular AI code editor. In this post I want to share how I found an interesting data exfiltration issue, the demo exploits built and how it got fixed. When using Cursor I noticed that it can render Mermaid diagrams. Cursor Renders Mermaid Diagrams If you are not familiar with Mermaid, it has a simple syntax: graph TD User --> Computer This will create a diagram as follows:

Reference details

Source category
Research & news
Report title
Cursor IDE: Arbitrary Data Exfiltration Via Mermaid (CVE-2025-54132)
First reported
Aug 04, 2025 07:04 UTC
Last reported
Aug 04, 2025 07:04 UTC
Catalog updated
Oct 08, 2026 03:44 UTC
Record ID
7974087dda0fe39d532923ee83ee389fb9b0a38d7bd162d0ba1ac4063ae6c158

CVEs mentioned by sources

Published indicators

Network indicators are visibly defanged. This page does not make them clickable or send them to another service.

No validated file hashes or network indicators are stored for this record.

Source observations

src_c25d91fa3ad9ae9ac7

Source-provided label
Not reported
Evidence class
mentioned in report
Confidence
Not reported
Observed
Aug 04, 2025 07:04 UTC
Retrieved
Oct 08, 2026 03:44 UTC

This record contains metadata and attribution only. It does not host, download, unpack, render, or execute malware samples.

Feed collection status

Sources represented on this page. Publication and observation dates describe the content; successful batch dates describe local collection. A recent batch does not certify complete coverage or current provider availability.

1 sources: 0 stale, 0 needing attention, 0 paused, 1 unverified.

Review source update dates and status
  • src_c25d91fa3ad9ae9ac7Collection status unverifiedLast successful batch: Unverified

Stale means older than twice the recorded collection interval, with a minimum of one hour; without an interval, the threshold is 24 hours. Cached content remains available while a feed is stale, paused, or unverified.