CVE-2025-55706 in Movable Type
Summary
by MITRE • 08/20/2025
URL redirection to untrusted site ('Open Redirect') issue exists in Movable Type. If this vulnerability is exploited, an invalid parameter may be inserted into the password reset page, which may lead to redirection to an arbitrary URL.
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Analysis
by VulDB Data Team • 08/20/2025
The vulnerability identified as CVE-2025-55706 represents a critical open redirect flaw within the Movable Type content management system that poses significant security risks to organizations relying on this platform. This vulnerability falls under the Common Weakness Enumeration category CWE-601, specifically targeting URL redirection mechanisms that fail to properly validate destination URLs. The flaw enables attackers to manipulate the password reset functionality by injecting malicious parameters that redirect users to arbitrary external domains, potentially facilitating phishing attacks and credential theft operations.
The technical implementation of this vulnerability stems from insufficient input validation within the password reset page functionality of Movable Type. When users attempt to reset their passwords, the system accepts user-supplied parameters without proper sanitization or domain verification checks. This allows malicious actors to craft URLs that include crafted redirect parameters, which are then processed by the application without adequate security controls. The vulnerability specifically affects the authentication flow where the system should validate that redirect destinations originate from trusted domains before executing the redirection.
The operational impact of this vulnerability extends beyond simple phishing vector exploitation, as it can be leveraged for more sophisticated attack chains within the broader context of the MITRE ATT&CK framework. An attacker could potentially use this vulnerability to redirect users to malicious sites that mimic legitimate Movable Type interfaces, thereby enabling credential harvesting through social engineering. The open redirect vulnerability creates a trust boundary violation where users are unknowingly directed from a legitimate application interface to potentially malicious external domains, undermining the security posture of the entire system.
Organizations utilizing Movable Type must implement immediate mitigations to address this vulnerability, including implementing strict URL validation mechanisms that only permit redirection to predetermined trusted domains. The recommended approach involves deploying a whitelist-based validation system that explicitly defines acceptable redirect destinations and rejects any parameters attempting to redirect to external domains. Additionally, security patches should be applied as soon as available from the vendor to address the root cause of the vulnerability. Network-level controls such as web application firewalls can provide additional defense-in-depth measures by monitoring and blocking suspicious redirect patterns. The implementation of proper input validation and output encoding practices should be enforced throughout the application's authentication flows to prevent similar issues from occurring in other components of the system.