CVE-2023-30328
An issue in the helper tool of Mailbutler GmbH Shimo VPN Client for macOS v5.0.4 allows attackers...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2023-30328- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List
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.
- Record
CVE-2023-30328- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
EUVDEUVD-2023-34751
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.
- Record
EUVD-2023-34751- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-wjq5-7847-86xm
An issue in the helper tool of Mailbutler GmbH Shimo VPN Client for macOS v5.0.4 allows attackers...
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.
- Record
GHSA-wjq5-7847-86xm- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-30328 is a critical vulnerability (CVSS 9.8) in Mailbutler Shimo, published May 4, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.09%, the 65th percentile. No source names a fixed version.