
SEO404 Security & Risk Analysis
wordpress.org/plugins/seo404SEO404 redirects to the Blog front page with a 301. No more 404 errors on Google/Bing/etc.
Is SEO404 Safe to Use in 2026?
Generally Safe
Score 85/100SEO404 has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.
The seo404 plugin v0.4 presents a seemingly secure posture based on the provided static analysis and vulnerability history. The absence of known CVEs and the fact that there are no currently unpatched vulnerabilities are positive indicators. Furthermore, the plugin reports zero AJAX handlers, REST API routes, shortcodes, or cron events as entry points, suggesting a minimal attack surface. The code analysis also shows no dangerous functions and all SQL queries utilize prepared statements, which are excellent security practices. However, a significant concern is the 100% of output escaping being unproperly handled, meaning any dynamic content generated by the plugin could be susceptible to cross-site scripting (XSS) vulnerabilities. This is a notable weakness that could be exploited if user-supplied data or dynamic content is not correctly sanitized before being displayed to the user.
Despite the lack of known vulnerabilities and a small attack surface, the unescaped output is a critical flaw that should not be overlooked. While the plugin may have a clean history, this does not guarantee future safety, especially with the identified output escaping issue. The plugin's strengths lie in its lack of complex entry points and secure database interaction. The primary weakness is the potential for XSS due to improper output handling. Therefore, while the overall risk appears low due to the limited attack surface and clean history, the unescaped output represents a concrete and exploitable vulnerability.
Key Concerns
- Output escaping is not properly handled
SEO404 Security Vulnerabilities
SEO404 Code Analysis
Output Escaping
SEO404 Attack Surface
WordPress Hooks 3
Maintenance & Trust
SEO404 Maintenance & Trust
Maintenance Signals
Community Trust
SEO404 Alternatives
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Simple, SEO friendly, permanent (301) and automatic redirect of 404 errors.
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ceewp-redirect-404-to-home
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SEO404 Developer Profile
1 plugin · 70 total installs
How We Detect SEO404
Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.
Asset Fingerprints
HTML / DOM Fingerprints
<input type="text" name="maindomain" value="<?php echo get_option('maindomain'); ?>" /><p>Where should the 301 redirect to? e.g. http://mysite.com/</p><p>Here it is also possible to add tracking for Google analytics to allow information on the redirect e.g. http://mysite.com/?utm_source=SEO404&utm_medium=OldDomain&utm_campaign=Redirect</p>