TC-2025-0018 · VSCODE · PACKAGE

[email protected]

CVE-2025-54135 (CurXecute, CVSS 8.6): indirect prompt injection from external MCP server or untrusted file overwrites ~/.cursor/mcp.json, triggering immediate host RCE.

Primary advisory (Aim Security) Back to all 66 records

Signed ledger verdict

TC-2025-0018
Known bad (exit 2) vscode:[email protected]

IOC & scope: vscode:[email protected] (CVE-2025-54135 CurXecute). Verified by human review and signed into the CC-BY 4.0 OSV v1.6.0 feed.

Credited finder
Aim Security ↗
Recorded timestamp
2025-08-05
Canonical SHA-256
d407186813e255df…
Local hook action
Block (exit 2)
Run live in Counter Workbench

Signed in /feed.json (.sig).

01 8-Vector Capability X-Ray (ABOM) & OWASP Agentic Crosswalk

Deterministic capability profile and taxonomy mapping.

Every artifact in the threat.cafe ledger is profiled across eight execution vectors and mapped to the OWASP Top 10 for Agentic Applications (ASI01-ASI10) and Agentic Skills & Tools (AST01-AST10).

8-Vector Capability X-Ray (ABOM)

  1. 1. Filesystem
    Sensitive paths touched: ~/.cursor/mcp.json, .cursor/mcp.json
  2. 2. Environment
    Variables harvested: None observed
  3. 3. Network
    Outbound egress domains: None observed
  4. 4. Subprocess
    Process execution primitives: auto-spawned MCP stdio command on config save
  5. 5. Lifecycle
    Install / startup hooks: None observed
  6. 6. OAuth / MCP
    Declared scopes: None observed
  7. 7. Obfuscation
    Encoding / steganography: None observed
  8. 8. Provenance
    Attestation status: vulnerable_release_cve_2025_54135

Governance & detector mapping

  1. OWASP Agentic ASI (2026): ASI01 (Agent Goal Hijack), ASI02 (Tool Misuse & Exploitation), ASI05 (Unexpected Code Execution (RCE))
  2. OWASP Agentic AST (2026): AST02 (Tool & Skill Injection), AST05 (Sandbox Escape & Local Execution)
  3. Deterministic rules matched: CONFIG_05_REPO_HOOK_RCE, RUNTIME_02_CONFIG_WRITE_FIREWALL

Version scoping & related records

Local CLI verification

$ threat-cafe-hook check "vscode:[email protected]"
[threat.cafe] known_bad: vscode:[email protected] (TC-2025-0018)
  Reason: CVE-2025-54135 (CurXecute, CVSS 8.6): indirect prompt injection from external MCP server o
  Source: https://nvd.nist.gov/vuln/detail/CVE-2025-54135 (credited to Aim Security)

OSV v1.6.0 machine-readable record

Included in /feed.json under CC-BY 4.0 license and verified by /feed.json.sig.

{
  "schema_version": "1.6.0",
  "id": "TC-2025-0018",
  "modified": "2025-08-05T10:00:00Z",
  "published": "2025-08-05T10:00:00Z",
  "summary": "CVE-2025-54135 (CurXecute, CVSS 8.6): indirect prompt injection from external MCP server or untrusted file overwrites ~/.cursor/mcp.json, triggering immediate host RCE.",
  "affected": [
    {
      "package": {
        "ecosystem": "vscode",
        "name": "anysphere.cursor"
      },
      "versions": [
        "1.2.0"
      ]
    }
  ],
  "credits": [
    {
      "name": "Aim Security",
      "type": "FINDER"
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54135"
    },
    {
      "type": "WEB",
      "url": "https://threat.cafe/incidents/tc-2025-0018/"
    }
  ],
  "database_specific": {
    "target": "vscode:[email protected]",
    "kind": "package",
    "verdict": "known_bad",
    "ioc": "vscode:[email protected] (CVE-2025-54135 CurXecute)",
    "artifact_sha256": "d407186813e255df75157f2c930e9d327aca1d61ad8eb63161c152c095abc2a4",
    "owasp_asi": [
      "ASI01",
      "ASI02",
      "ASI05"
    ],
    "owasp_ast": [
      "AST02",
      "AST05"
    ],
    "rules_matched": [
      "CONFIG_05_REPO_HOOK_RCE",
      "RUNTIME_02_CONFIG_WRITE_FIREWALL"
    ],
    "abom": {
      "fs_sensitive": [
        "~/.cursor/mcp.json",
        ".cursor/mcp.json"
      ],
      "env_harvest": [],
      "net_egress": [],
      "proc_exec": [
        "auto-spawned MCP stdio command on config save"
      ],
      "install_hooks": [],
      "oauth_scopes": [],
      "obfuscation": [],
      "provenance": "vulnerable_release_cve_2025_54135"
    },
    "license": "CC-BY-4.0",
    "record_digest": "sha256:a29484aeec6658e9423be93b71cbb8eabe6d78244aa15994a192a67916a9acc4",
    "release_signature_url": "https://threat.cafe/feed.json.sig"
  }
}

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