Is this vulnerability remotely exploitable?

It is indirectly remote. An attacker typically must convince a developer to open and interact with a crafted HTML page in Live Server, often delivered via a malicious repository, attachment, or shared project. Once the page is open and scripts run, file exfiltration can happen over the network.

What level of access does an attacker need?

The attacker does not need direct access to the victim's machine or editor. They need the ability to supply or influence HTML/JavaScript content that the victim opens through Live Server. The extension and browser then bridge the gap to local files.

What is the safest general fix pattern?

The safest pattern is to ensure that untrusted content cannot execute powerful scripts in a context that exposes sensitive local files. Practically, this means strictly scoping what files are served, isolating untrusted projects, and treating the local dev server as an untrusted boundary that must not leak secrets.

Severity:

CRITICAL RISK

(9.1)

File Exfiltration via HTML-Driven XSS (CWE-79) in VS Code Live Server Extension

CVE-2025-65717

Published:

Feb 16, 2026

Status:

Received

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Cross-Site Scripting (XSS) and Data Exposure

CWE:

CWE-79;CWE-200;CWE-601

Impact:

Sensitive File Exfiltration from Developer Workstation

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Cross-Site Scripting (XSS) and Data Exposure

CWE:

CWE-79;CWE-200;CWE-601

Impact:

Sensitive File Exfiltration from Developer Workstation

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.

Get Started

Ship clean & secure code faster

START 14 DAYS FREE TRIAL

BOOK A DEMO

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

File Exfiltration via HTML-Driven XSS (CWE-79) in VS Code Live Server Extension

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare