evernote-mcp-server openBrowser Command Injection Privilege Escalation Vulnerability

October 30th, 2025
ZDI-25-983 ZDI-CAN-27913

CVE ID

CVE-2025-12489

CVSS Score

7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

evernote-mcp-server

Affected Products

evernote-mcp-server

Vulnerability Details

This vulnerability allows local attackers to escalate privileges on affected installations of evernote-mcp-server. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the openBrowser function. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the service account.

Additional Details

evernote-mcp-server has issued an update to correct this vulnerability. More details can be found at:
https://github.com/brentmid/evernote-mcp-server/commit/1e66c78c4ce6ea294ac6b0eb289a9eae9c5e9579

Disclosure Timeline

  • 2025-09-23 - Vulnerability reported to vendor
  • 2025-10-30 - Coordinated public release of advisory
  • 2025-10-30 - Advisory Updated

Credit

Peter Girnus (@gothburz) and Brandon Niemczyk of Trend Zero Day Initiative

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