CVE-2022-1580 in Site Offline or Coming Soon or Maintenance Mode Plugin
Summary
by MITRE • 09/19/2022
The Site Offline Or Coming Soon Or Maintenance Mode WordPress plugin before 1.5.3 prevents users from accessing a website but does not do so if the URL contained certain keywords. Adding those keywords to the URL's query string would bypass the plugin's main feature.
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Analysis
by VulDB Data Team • 10/20/2022
The vulnerability identified as CVE-2022-1580 affects the Site Offline Or Coming Soon Or Maintenance Mode WordPress plugin version 1.5.2 and earlier, representing a critical access control flaw that undermines the core security mechanism of the plugin. This issue stems from a flawed implementation where the plugin's access restriction functionality can be circumvented through strategic manipulation of URL query parameters. The vulnerability directly impacts the plugin's ability to enforce maintenance mode restrictions, creating a significant security gap that allows unauthorized access to protected content.
The technical flaw manifests as a lack of proper input validation and sanitization within the plugin's access control logic. When users attempt to access a website that should be in maintenance mode, the plugin normally blocks access to all pages. However, the implementation contains a critical oversight where specific keywords embedded within the URL's query string bypass the intended access restrictions. This occurs because the plugin's filtering mechanism fails to properly sanitize or validate the query parameters before determining access permissions. The vulnerability falls under CWE-284 Access Control Issues, specifically representing a privilege escalation scenario where unauthorized users can gain access to restricted content.
The operational impact of this vulnerability extends beyond simple access bypass and represents a serious threat to website security and integrity. Attackers can exploit this weakness to gain unauthorized access to maintenance mode protected content, potentially exposing sensitive data, administrative interfaces, or unpublished content. This vulnerability is particularly concerning for websites that rely on maintenance mode to protect against unauthorized access during updates or system modifications. The bypass mechanism allows threat actors to access restricted areas without proper authentication, potentially leading to data breaches, content tampering, or further exploitation of the website's infrastructure. The vulnerability's impact is amplified because it operates silently without alerting administrators to the unauthorized access attempts.
Security professionals should immediately update the affected plugin to version 1.5.3 or later, which contains the necessary patches to address the access control bypass. Organizations should also implement additional monitoring to detect unusual access patterns during maintenance periods. The mitigation strategy should include comprehensive testing of the plugin's access control mechanisms after applying the update. This vulnerability demonstrates the importance of proper input validation and access control implementation in web applications, aligning with ATT&CK technique T1078 Valid Accounts to prevent similar issues in other security controls. Organizations should conduct thorough security assessments of their WordPress installations to identify other potential access control vulnerabilities that may present similar bypass mechanisms.