CVE-2025-14265
Improper server-side validation in ScreenConnect extension framework
CRITICAL 9.1
At a glance
- Source
- NVD
- EPSS
- EPSS 0.37 % · percentile 31 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- ConnectWise
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-494 — Download of Code Without Integrity Check
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H | ConnectWise |
| CVSS 3.1 | CRITICAL 9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H | NVD · 7d616e1a-3288-43b1-a0dd-0a65d3e70a49 (Secondary) |
European references
- ENISA EUVD · EUVD-2025-202687
- GCVE · GCVE-0-2025-14265
Affected configurations (NVD CPE)
cpe:2.3:a:connectwise:screenconnect:*:*:*:*:*:*:*:*< 25.8.0.9438
Affected products
| Product | Versions |
|---|---|
| ConnectWise · ScreenConnect | affected All versions prior to 2025.8 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |