CVE-2022-1895 in underConstruction Plugin
Summary
by MITRE • 06/20/2022
The underConstruction WordPress plugin before 1.20 does not have CSRF check in place when deactivating the construction mode, which could allow attackers to make a logged in admin perform such action via a CSRF attack
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Analysis
by VulDB Data Team • 06/20/2022
The CVE-2022-1895 vulnerability affects the underConstruction WordPress plugin version 1.20 and earlier, presenting a significant security risk through the absence of Cross-Site Request Forgery (CSRF) protection mechanisms. This flaw specifically impacts the plugin's deactivation functionality for construction mode, creating an exploitable condition that can be leveraged by malicious actors to manipulate administrator sessions without their knowledge or consent.
The technical implementation of this vulnerability stems from the plugin's failure to implement proper CSRF token validation during the deactivation process of construction mode. When administrators perform actions within the WordPress admin interface, the system should verify that requests originate from legitimate sources through the use of unique, unpredictable tokens generated for each session. Without this protection, attackers can craft malicious requests that appear to come from authenticated administrators, effectively bypassing the normal security controls that protect WordPress installations from unauthorized modifications.
This vulnerability operates within the context of the WordPress ecosystem where administrators have elevated privileges and can make critical changes to site functionality. The attack vector typically involves tricking a logged-in administrator into visiting a malicious website or clicking on a crafted link that contains a hidden form submission or API call to the vulnerable plugin's deactivation endpoint. Since the administrator is already authenticated, the malicious request can execute with full administrative privileges, potentially compromising the entire website's construction mode settings.
The operational impact of CVE-2022-1895 extends beyond simple unauthorized access, as it can lead to complete site compromise or disruption of critical business operations. Construction mode typically restricts public access to a website during development, maintenance, or launch phases, and unauthorized deactivation can expose sensitive content or incomplete features to public view. This vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery vulnerabilities in web applications, and represents a clear violation of secure coding practices that should be implemented in all web-based administrative interfaces.
Organizations affected by this vulnerability should immediately upgrade to version 1.20 or later of the underConstruction plugin, as this release includes the necessary CSRF protection mechanisms. Additionally, administrators should conduct comprehensive security audits of their WordPress installations to identify any other plugins or themes that may be missing CSRF protections. The remediation process should include implementing proper token validation for all administrative actions, following the ATT&CK framework's recommendations for securing web applications and preventing unauthorized privilege escalation through session manipulation attacks. Security teams should also consider implementing additional monitoring for suspicious administrative activities and ensure that all WordPress plugins are regularly updated to address known vulnerabilities.