# CVE-2025-14265: Improper server-side validation in ScreenConnect extension framework

> Authorized users can install untrusted extensions to execute arbitrary code or access configuration data on the ScreenConnect server.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Dec 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-3hj4-mq9q-jpmj

## What is CVE-2025-14265?

CVE-2025-14265 is a critical code injection vulnerability in ConnectWise ScreenConnect, published on 11 Dec 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official 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.

Weakness: CWE-494 (Download of Code Without Integrity Check)

## Which versions are affected by CVE-2025-14265?

It affects 1 product.


Products: Connectwise Screenconnect.

## How do I fix CVE-2025-14265?

No fix has been published for CVE-2025-14265 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-14265 being exploited?

There is no known exploitation of CVE-2025-14265 in the wild and no public exploit code.

## Other vulnerabilities in ConnectWise ScreenConnect

- [CVE-2024-1709](https://insights.sbomify.com/CVE-2024-1709/): ConnectWise ScreenConnect Authentication Bypass (critical 10.0, exploited in the wild)
- [CVE-2026-84869](https://insights.sbomify.com/CVE-2026-84869/): ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization (critical 9.9, exploited in the wild)
- [CVE-2024-1708](https://insights.sbomify.com/CVE-2024-1708/): ConnectWise ScreenConnect Path Traversal (high 8.4, exploited in the wild)
- [CVE-2025-3935](https://insights.sbomify.com/CVE-2025-3935/): ConnectWise ScreenConnect Improper Authentication (high 8.1, exploited in the wild)
- [CVE-2025-14823](https://insights.sbomify.com/CVE-2025-14823/): Certificate Signing Extension Returns Encrypted Values (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-14265 and fix it if it is affected.

What it is: CVE-2025-14265 is a critical code injection vulnerability in ConnectWise ScreenConnect, published on 11 Dec 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-14265 in the wild and no public exploit code.

Affected product: ConnectWise ScreenConnect. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-14265/ (Markdown: https://insights.sbomify.com/CVE-2025-14265/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-14265
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-14265
- OSV: https://osv.dev/vulnerability/CVE-2025-14265

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-14265/
Summaries are generated and may contain mistakes; the official description above is the record.