CVE-2025-12980 in Post Grid Gutenberg Blocks for News, Magazines, Blog Websites Plugin
Summary
by MITRE • 12/21/2025
The Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the '/ultp/v2/get_dynamic_content/' REST API endpoint in all versions up to, and including, 5.0.3. This makes it possible for unauthenticated attackers to retrieve sensitive user metadata, including password hashes.
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Analysis
by VulDB Data Team • 12/22/2025
The vulnerability identified as CVE-2025-12980 affects the Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX plugin for WordPress, specifically targeting versions up to and including 5.0.3. This represents a critical security flaw that undermines the integrity of WordPress installations utilizing this particular plugin. The issue stems from insufficient access control mechanisms within the plugin's REST API implementation, creating a pathway for unauthorized entities to exploit the system. The vulnerability manifests through the '/ultp/v2/get_dynamic_content/' endpoint, which fails to properly validate user capabilities before exposing sensitive data. This oversight creates a significant risk for WordPress sites that rely on the plugin for content management and display functionalities.
The technical flaw constitutes a missing capability check within the WordPress REST API framework, directly violating established security principles for access control validation. This type of vulnerability aligns with CWE-284, which addresses improper access control in software systems, and represents a classic case of insufficient authorization checks. The REST API endpoint in question does not properly verify whether the requesting entity possesses the necessary privileges to access the requested resources. Attackers can leverage this weakness to make unauthorized requests to the endpoint without authentication, thereby bypassing the normal WordPress permission model that typically requires users to be logged in with appropriate roles. The vulnerability's impact extends beyond simple data exposure, as it specifically allows retrieval of password hashes, which represents a severe compromise of user authentication mechanisms.
The operational impact of this vulnerability is substantial for WordPress administrators and site owners who have deployed the affected plugin version. Unauthenticated attackers can exploit this flaw to gather sensitive user metadata, including potentially compromising password hashes that could be used for credential stuffing attacks or further exploitation attempts. This vulnerability essentially allows attackers to perform reconnaissance activities against user accounts without any authentication requirements, creating a backdoor for potential account takeovers or privilege escalation. The implications extend to the broader WordPress ecosystem, as compromised user credentials can be leveraged across multiple platforms where users may have reused passwords. Additionally, the vulnerability affects the plugin's core functionality by undermining the expected security boundaries that should protect user data and system integrity.
Organizations and administrators should immediately implement mitigations to address this vulnerability, beginning with updating the PostX plugin to the latest available version that contains the necessary security patches. The vulnerability's presence in versions up to 5.0.3 indicates that the plugin developers have likely already addressed the issue in subsequent releases, making timely updates the primary defense mechanism. System administrators should also consider implementing additional monitoring measures to detect unauthorized access attempts to the affected REST API endpoint, as this could serve as an early warning system for potential exploitation. Network-level controls such as API rate limiting and IP-based restrictions could provide additional protection while waiting for official patches. The vulnerability underscores the importance of regular security audits and proper capability validation within WordPress plugins, aligning with ATT&CK technique T1078 which covers valid accounts and T1566 which addresses credential harvesting through various attack vectors. Organizations should also conduct thorough security assessments of all installed plugins to identify similar vulnerabilities that might exist within their WordPress environments.