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TI-2023-14228 Aliases CVE-2023-30328GHSA-wjq5-7847-86xm

An issue in the helper tool of Mailbutler GmbH Shimo VPN Client for macOS v5.0.4 allows…

Priority HIGH 82CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-287.

Summary

An issue in the helper tool of Mailbutler GmbH Shimo VPN Client for macOS v5.0.4 allows attackers to bypass authentication via PID re-use.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01087 65th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mailbutler:shimo:5.0.4:*:*:*:*:macos:*:*5.0.4VulnerableMailbutler
  • cpe:2.3:a:mailbutler:shimo:5.0.4:*:*:*:*:macos:*:* Versions 5.0.4 Vulnerable ·Mailbutler

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-30328
  2. 2026-10-03 Alias added: GHSA-wjq5-7847-86xm

References

Exploit 2

  • TI-2018-04981 In the VPN client in Mailbutler Shimo before 4.1.5.1 on macOS, the… CVSS 3.0CRITICAL 9.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences