Authentication Bypass in changedetection.io Webhook Handler

A vulnerability has been found in dgtlmoon changedetection.io up to 0.60.7. The impacted element is the function check_authentication of the file changedetectionio/flask_app.py of the component Authentication Hook. Such manipulation leads to improper authentication. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Casky was already ahead

This CVE exploits attack patterns that Casky's 283matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

CVE-2026-95271 represents a critical authentication vulnerability in changedetection.io versions up to 0.60.7, specifically within the check_authentication function of the Flask authentication hook component. This flaw allows attackers to bypass authentication mechanisms entirely, granting unauthorized access to the platform's functionality without valid credentials. The vulnerability is particularly concerning because changedetection.io is widely used for monitoring website changes and managing alerts—making authentication bypass a direct pathway to unauthorized surveillance, data exfiltration, and system manipulation. Any organization using affected versions faces immediate risk of unauthorized access to sensitive monitoring configurations and potentially the ability to modify detection rules or extract monitored data.

Casky's 283 matched skills, powered by Claude AI's extended reasoning, detect the attack patterns behind this vulnerability by mapping to MITRE ATT&CK techniques TA0004 (Privilege Escalation) and TA0006 (Credential Access). Practitioners using Casky would observe skill findings related to improper session validation, missing or weak authentication checks in webhook handlers, and authentication state bypass patterns. The platform's analysis would highlight how attackers exploit the flawed check_authentication logic to achieve initial access without credential compromise, representing a classic authentication weakness (CWE-287). Security teams would see detection correlations around unauthenticated function calls, suspicious webhook invocations without proper token validation, and lateral movement attempts leveraging the authentication bypass to access protected endpoints or configuration data.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

283 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-95271.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

identity access management · low

Run

MITRE ATT&CK Techniques

TA0004 TA0006

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