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9.1
CRITICAL CVSS 3.1
CVE-2025-14265
Improper server-side validation in ScreenConnect extension framework
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.

INFO

Published Date :

Dec. 11, 2025, 3:15 p.m.

Last Modified :

Dec. 12, 2025, 3:18 p.m.

Remotely Exploit :

Yes !

Source :

7d616e1a-3288-43b1-a0dd-0a65d3e70a49
Affected Products

The following products are affected by CVE-2025-14265 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Connectwise screenconnect
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 CRITICAL 7d616e1a-3288-43b1-a0dd-0a65d3e70a49
Solution
Update ScreenConnect to 25.8 for enhanced integrity checks and secure extension handling.
  • Upgrade ScreenConnect to version 25.8.
  • Verify extension subsystem integrity checks.
  • Restrict installation to trusted extensions.
  • Apply all available security updates.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-14265.

URL Resource
https://www.connectwise.com/company/trust/security-bulletins/screenconnect-2025.8-security-patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-14265 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-14265 weaknesses.

CAPEC-184: Software Integrity Attack Software Integrity Attack CAPEC-185: Malicious Software Download Malicious Software Download CAPEC-186: Malicious Software Update Malicious Software Update CAPEC-187: Malicious Automated Software Update via Redirection Malicious Automated Software Update via Redirection CAPEC-533: Malicious Manual Software Update Malicious Manual Software Update CAPEC-538: Open-Source Library Manipulation Open-Source Library Manipulation CAPEC-657: Malicious Automated Software Update via Spoofing Malicious Automated Software Update via Spoofing CAPEC-662: Adversary in the Browser (AiTB) Adversary in the Browser (AiTB) CAPEC-691: Spoof Open-Source Software Metadata Spoof Open-Source Software Metadata CAPEC-692: Spoof Version Control System Commit Metadata Spoof Version Control System Commit Metadata CAPEC-693: StarJacking StarJacking CAPEC-695: Repo Jacking Repo Jacking

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-14265 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-14265 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 7d616e1a-3288-43b1-a0dd-0a65d3e70a49

    Dec. 11, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
    Added CWE CWE-494
    Added Reference https://www.connectwise.com/company/trust/security-bulletins/screenconnect-2025.8-security-patch
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact