CVE-2026-63100
Received Received - Intake

Missing Authorization in Maybe Through Allows Privilege Escalation

Publication date: 2026-07-17

Last updated on: 2026-07-17

Assigner: VulnCheck

Description
Maybe through 0.6.0 contains a missing authorization vulnerability that allows authenticated low-privilege member-role users to access and modify global hosting settings by exploiting unprotected show and update actions in the Settings::HostingsController, where the before_action ensure_admin filter is applied only to the clear_cache action. Attackers can read the operator's Synth API key rendered in plaintext via a form field value attribute, overwrite it with an attacker-controlled value, toggle public registration settings, and disable email confirmation requirements to disrupt the entire instance.

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Meta Information

Published
2026-07-17
Last Modified
2026-07-17
Generated
2026-07-17
AI Q&A
2026-07-17
EPSS Evaluated
N/A
NVD
CVE-2026-63100
EUVD
EUVD-2026-45199

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

CVE-2026-63100 is a missing authorization vulnerability in Maybe versions up to 0.6.0. It allows authenticated low-privilege member-role users to access and modify global hosting settings due to unprotected show and update actions in the Settings::HostingsController. The before_action ensure_admin filter is only applied to the clear_cache action, leaving other actions exposed.

Detection Guidance

Check if Maybe application versions up to 0.6.0 are installed. Inspect network traffic for unauthorized access to Settings::HostingsController show and update actions by low-privilege users. Look for plaintext exposure of Synth API keys in HTML responses or logs.

Impact Analysis

Attackers can read the operator's Synth API key in plaintext, overwrite it with a malicious value, toggle public registration settings, and disable email confirmation requirements. This could disrupt the entire instance's functionality, enable quota theft, billing fraud, denial of market data features, unauthorized public registration, and impersonation risks.

Compliance Impact

This vulnerability could lead to violations of GDPR and HIPAA due to unauthorized access to sensitive data like API keys and user settings. Attackers could disable email confirmation, enabling impersonation, and modify global settings affecting all users. Exposure of plaintext API keys may also breach confidentiality requirements.

Mitigation Strategies

Upgrade Maybe to the latest version beyond 0.6.0. Ensure the ensure_admin filter is applied to all sensitive actions in Settings::HostingsController. Restrict access to global hosting settings to admin-only users. Avoid storing Synth API keys in plaintext.

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