CVE-2026-88903

Summary

The Topcontent WordPress plugin allows unauthenticated users to publish malicious posts with arbitrary JavaScript due to missing authorization checks and disabled HTML sanitization. This creates a high-risk vector for cross-site scripting attacks on vulnerable sites.

Exploitability

Exploitation is straightforward requiring no authentication or prior configuration, making it highly practical for attackers to publish malicious content across any affected WordPress site.

Blast radius

The impact could be widespread as attackers can publish malicious posts that execute JavaScript in visitors' browsers, potentially leading to session hijacking, data theft, or further compromise of the WordPress installation.

Detection

Monitor for unusual POST requests to /wp-admin/admin-ajax.php with action=tc_publish_post, particularly those containing JavaScript payloads in post_content fields without proper authentication tokens.

Prioritized remediation

Disable the Topcontent plugin immediately or upgrade to version 1.2.2 which fixes the authorization and sanitization issues.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.