evernote-mcp-server openBrowser Command Injection Privilege Escalation Vulnerability
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
