Privilege Escalation in Digits WordPress Plugin

Executive Summary

This vulnerability is a Privilege Escalation flaw in the Digits WordPress plugin up to version 9.1.0.5. It allows authenticated attackers with Subscriber-level access or higher to escalate their privileges to Administrator by exploiting missing authorization and role validation in the dig_update_wpwc_custom_fields() function. Attackers can do this by submitting a forged digits_reg_userrole value during profile updates if the site administrator has enabled the DIGITS User Role field.

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Impact Analysis

If exploited, this vulnerability could allow attackers to gain full administrative control of a WordPress site. This means they could modify site settings, install malicious plugins, steal data, or take over the entire website. The impact is significant as it requires only low-privilege access to escalate to full control.

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Compliance Impact

This vulnerability could lead to unauthorized access and modification of sensitive data, violating compliance requirements under GDPR and HIPAA. GDPR mandates strict data protection and breach notification, while HIPAA requires safeguarding protected health information. Exploitation could result in data breaches, leading to legal penalties and reputational damage.

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Mitigation Strategies

Immediately update the Digits plugin to the latest version beyond 9.1.0.5 to patch the privilege escalation vulnerability. Disable the DIGITS User Role field in plugin settings if not required. Review user roles and privileges for any unauthorized changes. Consider temporarily restricting Subscriber-level access until the update is applied.

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