
Referer Spam Blocker Security & Risk Analysis
wordpress.org/plugins/referer-spam-blockerBlock/blacklist known (and custom) spam referring domains at the WordPress level with an HTTP 403 Forbidden page.
Is Referer Spam Blocker Safe to Use in 2026?
Generally Safe
Score 100/100Referer Spam Blocker has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.
Based on the provided static analysis and vulnerability history, the "referer-spam-blocker" plugin v0.4 exhibits a very strong security posture. The analysis reveals an exceptionally clean codebase with no identified dangerous functions, no direct SQL queries (all prepared statements), and complete output escaping. Furthermore, there are no file operations or external HTTP requests, minimizing potential attack vectors.
The absence of any identified CVEs, past or present, coupled with the clean code signals, suggests a proactive and secure development approach for this version. The plugin also appears to have a minimal attack surface, with zero AJAX handlers, REST API routes, shortcodes, or cron events, all of which are reported as unprotected. This lack of entry points significantly reduces the opportunities for attackers.
While the plugin's current state is highly commendable and demonstrates excellent security practices, the complete lack of capability checks and nonce checks on its (hypothetical) entry points, if they were to exist, could be a minor concern in scenarios where functionality might be added in future versions without proper security considerations. However, given the current zero attack surface, this is purely a theoretical point. In its current state, the plugin appears to be extremely secure.
Key Concerns
- No nonce checks on entry points
- No capability checks on entry points
Referer Spam Blocker Security Vulnerabilities
Referer Spam Blocker Code Analysis
Output Escaping
Referer Spam Blocker Attack Surface
Maintenance & Trust
Referer Spam Blocker Maintenance & Trust
Maintenance Signals
Community Trust
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Referer Spam Blocker Developer Profile
2 plugins · 90 total installs
How We Detect Referer Spam Blocker
Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.
Asset Fingerprints
/wp-content/plugins/referer-spam-blocker/includes/css/admin-style.css/wp-content/plugins/referer-spam-blocker/includes/js/admin-script.js/wp-content/plugins/referer-spam-blocker/includes/js/admin-script.js/wp-content/plugins/referer-spam-blocker/includes/css/admin-style.css?ver=/wp-content/plugins/referer-spam-blocker/includes/js/admin-script.js?ver=