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4.4
WordPress Plugin Allows Hackers to Inject Malicious Code
CVE-2025-12037
Summary
A security flaw in the WP 404 Auto Redirect to Similar Post plugin for WordPress could allow hackers to inject malicious code into websites. This only affects WordPress sites with multi-site installations or where certain security features are turned off. To fix this, update the plugin to a version higher than 1.0.5.
Original title
The WP 404 Auto Redirect to Similar Post plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 1.0.5 due to insufficient input s...
Original description
The WP 404 Auto Redirect to Similar Post plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 1.0.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
nvd CVSS3.1
4.4
Vulnerability type
CWE-79
Cross-site Scripting (XSS)
Published: 18 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026