CVE-2025-4412: SparkLabs Viscosity · Incorrect Default Permissions
Affects SparkLabs ViscositySource CVE Database V5
Not known to be exploited · CVSS 4.8 Medium : upgrade to 1.11.5 when convenient.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.11.5
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 27 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade SparkLabs Viscosity to 1.11.5.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| SparkLabs Viscosity | Affected
| Fixed in
|
AI-suggested
European organizations should take the following specific actions to mitigate CVE-2025-4412: 1) Immediately upgrade all macOS installations of Viscosity to version 1.11.5 or later, where the vulnerability is fixed. 2) Implement strict endpoint security controls to prevent unauthorized local access, including enforcing strong user authentication, limiting administrative privileges, and using endpoint detection and response (EDR) tools to monitor for suspicious dynamic library loading or process injection activities. 3) Audit and restrict the use of Launch Agents and other mechanisms that can load processes or libraries with elevated TCC identities. 4) Educate users about the risks of granting file permissions and monitor file access logs for anomalies. 5) Employ application whitelisting to prevent unauthorized dynamic libraries from loading within Viscosity or other critical applications. 6) Regularly review and update macOS privacy and security settings to ensure that only necessary permissions are granted to applications. 7) Maintain an inventory of macOS endpoints running Viscosity to ensure timely patching and compliance. These measures go beyond generic advice by focusing on controlling local access vectors, monitoring dynamic library usage, and enforcing strict permission management aligned with the vulnerability's technical specifics.
Description
On macOS systems, by utilizing a Launch Agent and loading the viscosity_openvpn process from the application bundle, it is possible to load a dynamic library with Viscosity's TCC (Transparency, Consent, and Control) identity. The acquired resource access is limited without entitlements such as access to the camera or microphone. Only user-granted permissions for file resources apply. Access to other resources beyond granted-permissions requires user interaction with a system prompt asking for permission. This issue was fixed in version 1.11.5 of Viscosity.