dgtlmoon Changedetection.io 0.55.7 Settings Save api_access_token_enabled access control

Summaryinfo

A vulnerability classified as critical was found in dgtlmoon Changedetection.io 0.55.7. This vulnerability affects unknown code of the component Settings Save Handler. Executing a manipulation of the argument api_access_token_enabled can lead to access control. This vulnerability is tracked as CVE-2026-71204. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in dgtlmoon Changedetection.io 0.55.7. This vulnerability affects an unknown function of the component Settings Save Handler. The manipulation of the argument api_access_token_enabled with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

changedetection.io's /settings save handler builds an update dict from form.data['application'] and blind-merges it into the stored application settings via .update(). Because WTForms represents an unchecked checkbox as False rather than 'unchanged', and only the 'password' field is special-cased against this problem, a POST to /settings that omits the api_access_token_enabled field (e.g. a minimal scripted request) silently disables API key enforcement for the entire REST API, exposing the full watch list, history, and configuration to unauthenticated requests.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-71204 since 08/05/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/05/2026). The MITRE ATT&CK project declares the attack technique as T1068.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-53201). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• dgtlmoon

Name

• Changedetection.io

Version

• 0.55.7

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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