(0Day) mcp-server-siri-shortcuts shortcutName Command Injection Privilege Escalation Vulnerability
Vulnerability Details
This vulnerability allows local attackers to escalate privileges on affected installations of mcp-server-siri-shortcuts. 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 shortcutName parameter. 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
09/23/25 – ZDI requested the vendor’s PSIRT contacts in a GitHub issue
09/23/25 – the vendor provided their contacts
09/24/25 – ZDI submitted the report to the vendor
11/10/25 – ZDI asked for updates
12/14/25 – ZDI notified the vendor of the intention to publish the case as a 0-day advisory
-- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the product
Disclosure Timeline
- 2025-09-23 - Vulnerability reported to vendor
- 2026-01-09 - Coordinated public release of advisory
- 2026-01-09 - Advisory Updated
Credit
Peter Girnus (@gothburz) and Brandon Niemczyk of Trend Zero Day Initiative
