Is this vulnerability remotely exploitable?

Yes. Any unauthenticated user with network access to the affected changedetection.io instance can reach the impacted routes without logging in.

What level of access does an attacker need?

Only network access to the web interface is required. No credentials or prior session are needed when hitting routes whose authentication wrapper is not in the call chain.

What is the safest general fix pattern?

Ensure that the framework's routing decorators are the outermost decorators so that the registered view function includes all authentication and authorization wrappers. Additionally, centralize access control where possible (e.g., middleware or before-request hooks) so decorator ordering mistakes are less likely to remove protections.

Severity:

CRITICAL RISK

(9.8)

Missing Authorization Enforcement (CWE-863) in changedetection.io Flask Routes

CVE-2026-35490

Published:

Apr 7, 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

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Remote Code Execution by Authenticated Users

May 10, 2026

Vulnerability Type

Category:

Missing Authorization

CWE:

CWE-863

Impact:

Unauthorized Access to Protected Functionality

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authorization

CWE:

CWE-863

Impact:

Unauthorized Access to Protected Functionality

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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Missing Authorization Enforcement (CWE-863) in changedetection.io Flask Routes

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

(8.8)

PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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