Is this vulnerability remotely exploitable?

Yes. An attacker can exploit the issue remotely by crafting a URL containing a malicious `categoryDeleted` parameter and convincing a victim to open it in their browser.

Does an attacker need to be logged in to exploit this?

The attacker does not need their own account; they primarily need the ability to deliver a malicious link. However, the most damaging effects (such as modifying watch history or accessing sensitive user-specific data) depend on the victim being authenticated to Movary when they visit the link.

What is the safest general fix pattern?

The safest pattern is to treat all user-controlled data as untrusted, apply strict input validation to parameters like `categoryDeleted`, and enforce context-aware output encoding everywhere they are rendered. Using templating systems or view helpers that auto-escape output by default significantly reduces the risk.

Severity:

CRITICAL RISK

(9.3)

Reflected Cross-Site Scripting (CWE-79) via categoryDeleted Parameter in Movary

CVE-2026-23840

Published:

Jan 19, 2026

Status:

Analyzed

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)

CWE:

CWE-20;CWE-79

Impact:

Client-Side Code Execution / Account Compromise

Severity:

CRITICAL RISK

(9.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Cross-Site Scripting (XSS)

CWE:

CWE-20;CWE-79

Impact:

Client-Side Code Execution / Account Compromise

Severity:

CRITICAL RISK

(9.3)

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

Reflected Cross-Site Scripting (CWE-79) via categoryDeleted Parameter in Movary

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