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    CVE-2025-54135

    Cursor is a code editor built for programming with AI. Cursor allows writing in-workspace files with no user approval in versions below 1.3.9, If the file is a dotfile, editing it requires approval but creating a new one doesn't. Hence, if sensitive MCP files, such as the .cursor/mcp.json file don't already exist in the workspace, an attacker can chain a indirect prompt injection vulnerability to hijack the context to write to the settings file and trigger RCE on the victim without user approval. This is fixed in version 1.3.9.

    Published:Aug 5, 2025
    Last Modified:Aug 25, 2025
    EPS:Aug 5, 2025
    EPSS Score:0.00067
    CVSS Score:8.6

    Affected Products

    Vendor
    Anysphere
    Product
    Cursor
    Vendor
    Cursor
    Product
    Cursor

    Exploits

    https://github.com/anntsmart/CVE-2025-54135https://github.com/Cbdlll/test-mcphttps://github.com/hn1e13/test-mcp

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High