Remote command execution via clickable Mermaid JavaScript URI
Published Dec 19, 2025 · Updated Dec 19, 2025
Stored XSS in Dive before 0.11.1 allows remote attackers to execute commands through a clicked malicious Mermaid diagram node. Mermaid uses securityLevel loose, so JavaScript URI click actions run and can post a malicious command to /api/config/mcpserver. Exploitation requires a user to click the injected node; the backend then registers and executes the attacker-supplied MCP server command.
Summary
What happened
Stored XSS in Dive before 0.11.1 allows remote attackers to execute commands through a clicked malicious Mermaid diagram node. Mermaid uses securityLevel loose, so JavaScript URI click actions run and can post a malicious command to /api/config/mcpserver. Exploitation requires a user to click the injected node; the backend then registers and executes the attacker-supplied MCP server command.
The record
- CVE
- CVE-2025-66580
- Published
- Dec 19, 2025
- Updated
- Dec 19, 2025
- Vendor
- Open Agent Platform
- Product
- Dive
- Classifications
- CWE-79, CWE-94, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 19, 2025CVE publishedPublication date reported by the CVE source.
- Dec 19, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 0.11.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Mermaid click-handler proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo