Tinexta Infocert GoSign Desktop up to 2.4.1 ~/.gosign certificate validation ⚔ [Disputed]

Summaryinfo

A vulnerability categorized as critical has been discovered in Tinexta Infocert GoSign Desktop up to 2.4.1. This affects an unknown function of the file ~/.gosign. Such manipulation leads to certificate validation. This vulnerability is listed as CVE-2025-65083. The attack may be performed from remote. There is no available exploit. The actual existence of this vulnerability is currently in question.

Detailsinfo

A vulnerability was found in Tinexta Infocert GoSign Desktop up to 2.4.1. It has been rated as problematic. Affected by this issue is an unknown functionality of the file ~/.gosign. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is integrity. CVE summarizes:

GoSign Desktop through 2.4.1 disables TLS certificate validation when configured to use a proxy server. This can be problematic if the GoSign Desktop user selects an arbitrary proxy server without consideration of whether outbound HTTPS connections from the proxy server to Internet servers succeed even for untrusted or invalid server certificates. In this scenario (which is outside of the product's design objectives), integrity protection could be bypassed. In typical cases of a proxy server for outbound HTTPS traffic from an enterprise, those connections would not succeed. (Admittedly, the usual expectation is that a client application is configured to trust an enterprise CA and does not set SSL_VERIFY_NONE.) Also, it is of course unsafe to place ~/.gosign in the home directory of an untrusted user and then have other users execute downloaded files.

The advisory is shared for download at firma.infocert.it. This vulnerability is handled as CVE-2025-65083 since 11/17/2025. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1587.003.

The real existence of this vulnerability is still doubted at the moment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0246). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Lexmark Laser Printers

Productinfo

Vendor

• Tinexta Infocert

Name

• GoSign Desktop

Version

• 2.4.0
• 2.4.1

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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