Authenticated User Macro Value Disclosure in Zabbix Frontend

Executive Summary

This vulnerability allows authenticated users to exploit the frontend validate.api.exists action to extract plaintext user macro values, potentially leading to a loss of confidentiality.

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Detection Guidance

This vulnerability requires authenticated access to exploit. Monitor logs for unusual activity related to the validate.api.exists action. Check for repeated requests or unexpected data exposure in user macro values. No specific commands are provided in the context.

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Impact Analysis

An attacker with access could retrieve sensitive macro values, compromising confidential information such as user data or system configurations.

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Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating confidentiality requirements in GDPR and HIPAA, potentially resulting in legal and regulatory penalties.

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Mitigation Strategies

Apply the latest security patch from Zabbix immediately. Disable the validate.api.exists action if not required. Monitor user accounts for suspicious activity and enforce strong authentication measures.

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