CVE-2026-87836 in Comments Import & Export Plugin
Summary
by MITRE • 09/17/2026
The Comments Import & Export WordPress plugin before 2.5.4 does not restrict its comment export to users able to moderate comments, nor scope the export to content owned by the requesting user, allowing users with the Author role and above to retrieve every comment on the site, including commenter email addresses, IP addresses, unapproved comment content and comment meta.
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Analysis
by VulDB Data Team • 09/17/2026
The vulnerability identified in Comments Import & Export WordPress plugin versions prior to 2.5.4 represents a critical failure in access control logic within an administrative feature designed for data management. This flaw allows users with the Author role or higher privileges to bypass intended restrictions on exporting comment data from a WordPress installation. In standard WordPress architecture, while Authors can manage their own posts and comments associated with those posts, they do not possess the capability to moderate all site-wide content nor access sensitive metadata belonging to other users. The plugin's export functionality fails to enforce these role-based boundaries, effectively granting elevated privileges that exceed the user's assigned capabilities within the core CMS framework.
From a technical perspective, the root cause of this vulnerability lies in insufficient server-side validation during the comment retrieval process for export operations. When an authenticated user initiates an export request, the application logic does not adequately filter the dataset based on the requesting user's identity or role permissions regarding moderation rights. Consequently, instead of returning only comments authored by the requester or those approved and moderated according to their specific privileges, the system returns a comprehensive dump of all comment records stored in the database. This includes sensitive fields such as commenter email addresses, IP addresses, unapproved content that has not been publicly visible, and arbitrary comment meta data which may contain additional personally identifiable information or internal notes by moderators.
The operational impact of this vulnerability is significant due to the potential for large-scale privacy violations and unauthorized data exfiltration. By exploiting this flaw, an attacker with a low-privilege account such as Author can harvest vast amounts of personal data from all users who have interacted with the site. This includes email addresses which facilitate targeted phishing campaigns, IP addresses that reveal geographic locations and network identities, and unapproved comments which may contain sensitive discussions or information intended to remain private until moderation review is complete. The exposure of comment meta further compounds the risk by potentially leaking internal administrative notes or configuration details associated with specific user interactions. This scenario aligns closely with CWE-269 Improper Privilege Management and CWE-863 Incorrect Authorization, as the system fails to enforce proper access control policies for sensitive resources.
Furthermore, this vulnerability facilitates data aggregation that can be leveraged in subsequent attacks, mapping directly to ATT&CK techniques related to Collection via Local Data Staging or Exfiltration Over Alternative Protocol if combined with other vectors. The ability to retrieve unapproved content also poses a risk of information leakage regarding moderation workflows and potentially sensitive topics discussed by users who believed their input was not yet public. This undermines the trust model of multi-author WordPress sites where distinct roles are expected to maintain clear boundaries between personal data access and site-wide administrative functions.
To mitigate this vulnerability, immediate action is required to update the Comments Import & Export plugin to version 2.5.4 or later, which addresses these authorization checks. Administrators should verify that all instances of the plugin across their network have been patched. In environments where updating may not be immediately feasible, temporary mitigation strategies include restricting access to the export functionality through web application firewall rules if available, or auditing user roles to ensure no unnecessary Author-level accounts exist on sites with sensitive comment data. Regular security audits and penetration testing focused on role-based access control for plugin features are recommended to prevent similar misconfigurations in other third-party extensions that handle bulk data operations.