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CVE-2023-46116

Remote Code Execution via insufficiently sanitized call to shell.openExternal

9.3 Critical

Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the file: URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as ftp:, smb:, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

1.26%Up 1.2 points since Dec 16, 2023
90%50%10%1%

What each source reports

CVE List Score used 9.3

Remote Code Execution via insufficiently sanitized call to shell.openExternal

Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the file: URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as ftp:, smb:, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.

Record
CVE-2023-46116
CVSS 3.1
9.3 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-20
Updated
2026-11-02
EUVDEUVD-2023-50375 9.3

Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the file: URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as ftp:, smb:, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.

Record
EUVD-2023-50375
CVSS 3.1
9.3 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Updated
2026-11-03
NVD 9.3

Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the file: URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as ftp:, smb:, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.

Record
CVE-2023-46116
CVSS 3.1
9.3 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-20
Updated
2026-11-02
OSV 9.3

Remote Code Execution via insufficiently sanitized call to shell.openExternal

Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the file: URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as ftp:, smb:, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.

Record
CVE-2023-46116
CVSS 3.1
9.3 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-20
Updated
2026-11-02

Affected products

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-46116 is a critical vulnerability (CVSS 9.3) in Tuta Tutanota, published December 15, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.26%, the 69th percentile. No source names a fixed version.

References

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