CVE-2026-13703 in SEO Redirection Plugin
Summary
by MITRE • 08/06/2026
The SEO Redirection Plugin WordPress plugin before 9.19 does not perform a capability check in one of its authenticated AJAX actions, allowing any logged-in user such as a subscriber to read the site's configured 301 redirect rules, including their source and destination URLs.
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Analysis
by VulDB Data Team • 08/06/2026
The SEO Redirection Plugin for WordPress represents a critical security vulnerability that exposes sensitive configuration data through improper access controls within its authenticated ajax endpoints. This flaw affects versions prior to 9.19 and fundamentally undermines the principle of least privilege by failing to validate user capabilities before exposing administrative functionality. The vulnerability stems from a missing capability check in one of the plugin's authenticated ajax actions, which allows any logged-in user account regardless of role permissions to access redirect rule configurations through an unauthorized channel.
The technical implementation of this flaw involves the plugin's ajax handler not properly validating whether the requesting user possesses adequate privileges to access the specific functionality. In WordPress security architecture, this violates fundamental principles where authenticated endpoints must verify user capabilities before executing sensitive operations. The affected ajax action specifically handles retrieval of 301 redirect rules which contain both source and destination URL information that could potentially reveal internal site structure and navigation patterns.
From an operational perspective, this vulnerability creates significant risk for organizations relying on the plugin as it enables unauthorized access to critical redirection configurations that may include sensitive paths or internal resources. A subscriber-level attacker could potentially discover internal URL structures, identify deprecated pages, or uncover sensitive redirect targets that might be exploited in subsequent attacks. The exposure of these redirect rules provides valuable reconnaissance data that could facilitate more sophisticated social engineering attempts or help attackers understand the site's architecture and navigation flow.
The vulnerability aligns with CWE-284, which addresses improper access control issues in software systems, specifically targeting weak authorization mechanisms within authenticated environments. From an attack framework perspective, this flaw maps to multiple ATT&CK techniques including credential access through privilege escalation and reconnaissance activities that involve information gathering and discovery of system architecture. The impact extends beyond simple information disclosure as redirect rules often contain URLs that may point to sensitive internal resources or reveal the underlying content management structure.
Organizations should immediately implement mitigations by upgrading to version 9.19 or later, which includes proper capability checks in the affected ajax endpoint. Additionally, administrators should review user roles and permissions to ensure that only trusted users have access to potentially sensitive plugin features. The fix typically involves implementing wp_verify_nonce validation combined with appropriate capability checks using functions like current_user_can() to verify that users possess sufficient privileges before processing redirect rule queries. Regular security audits of WordPress plugins should include verification of ajax endpoint access controls to prevent similar issues from emerging in other third-party components.