# CVE-2025-34324: GoSign Desktop < 2.4.1 Insecure Update Mechanism RCE

> An attacker can execute arbitrary code by intercepting network traffic to supply a malicious update manifest when TLS validation is disabled via proxy settings.

- **Severity:** High 7.0 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Nov 2025
- **Updated:** 18 Nov 2025
- **Also known as:** GHSA-777r-h845-392r

## What is CVE-2025-34324?

CVE-2025-34324 is a high-severity code injection vulnerability in Tinexta InfoCert S.p.A. GoSign Desktop, published on 18 Nov 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

GoSign Desktop versions 2.4.0 and earlier use an unsigned update manifest for distributing application updates. The manifest contains package URLs and SHA-256 hashes but is not digitally signed, so its authenticity relies solely on the underlying TLS channel. In affected versions, TLS certificate validation can be disabled when a proxy is configured, allowing an attacker who can intercept network traffic to supply a malicious update manifest and corresponding package with a matching hash. This can cause the client to download and install a tampered update, resulting in arbitrary code execution with the privileges of the GoSign Desktop user on Windows and macOS, or with elevated privileges on some Linux deployments. A local attacker who can modify proxy settings may also abuse this behavior to escalate privileges by forcing installation of a crafted update.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2025-34324?

It affects 1 product.


Products: Infocert Gosign.

## How do I fix CVE-2025-34324?

No fix has been published for CVE-2025-34324 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34324 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34324 exists.

Public exploit code:

- CVE-2025-34324, CVE-2025-34327: GoSign Desktop TLS Bypass & Insecure Update Exploit Proof of Concept (github_poc): https://github.com/siddolo/gosign-desktop-exploit-poc

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34324 and fix it if it is affected.

What it is: CVE-2025-34324 is a high-severity code injection vulnerability in Tinexta InfoCert S.p.A. GoSign Desktop, published on 18 Nov 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34324 exists.

Affected product: Tinexta InfoCert S.p.A. GoSign Desktop. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-34324/ (Markdown: https://insights.sbomify.com/CVE-2025-34324/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34324
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34324
- OSV: https://osv.dev/vulnerability/CVE-2025-34324

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-34324/
Summaries are generated and may contain mistakes; the official description above is the record.