What’s Vulnerable › Vulnerabilities
CVE-2025-14265: Improper server-side validation in ScreenConnect extension framework
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-11 · updated 2026-10-07
- Weakness: CWE-494
Description
In versions of ScreenConnect™ prior to 25.8, server-side validation and integrity checks within the extension subsystem could allow the installation and execution of untrusted or arbitrary extensions by authorized or administrative users. Abuse of this behavior could result in the execution of custom code on the server or unauthorized access to application configuration data. This issue affects only the ScreenConnect server component; host and guest clients are not impacted. ScreenConnect 25.8 introduces enhanced server-side configuration handling and integrity checks to ensure only trusted extensions can be installed.
Affected products
- ConnectWise ScreenConnect: before 25.8.0.9438 — fixed in 25.8.0.9438
How to fix
Upgrade to a fixed version: ConnectWise ScreenConnect 25.8.0.9438. Check the vendor advisory for mitigations.
References
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