CVE-2018-6823

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-02-07 · updated 2026-06-17

Description

In the VPN client in Mailbutler Shimo before 4.1.5.1 on macOS, the com.feingeist.shimo.helper tool LaunchDaemon implements an unprotected XPC service that can be abused to execute scripts as root.

Affected products

Mailbutler Shimo: before 4.1.5.1 — fixed in 4.1.5.1

How to fix

Upgrade to a fixed version: Mailbutler Shimo 4.1.5.1. Check the vendor advisory for mitigations.

References

https://github.com/VerSprite/research/blob/master/advisories/VS-2018-001.md
https://github.com/VerSprite/research/blob/master/advisories/VS-2018-001.md

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