Vulnerability in Infocert Gosign
CVE-2025-34324
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (0.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 0.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.ush.it/2025/11/14/multiple-vulnerabilities-gosign-desktop-remote-code-execu… (Exploit, technical-description, Third Party Advisory, exploit)
- infocert.digital/consumer/gosign-suite/ (Product, product)
- www.vulncheck.com/advisories/gosign-desktop-insecure-update-mechanism-rce (Third Party Advisory, third-party-advisory)
- www.ush.it/2025/11/14/vulnerabilita-multiple-gosign-desktop-esecuzione-remota-c… (Exploit, technical-description, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2025-34324?
- CVE-2025-34324 is a high-severity vulnerability in Infocert Gosign, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.8/10. Published 2025-11-18.
- How severe is CVE-2025-34324?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2025-34324 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.