
FirstImpression.io Security & Risk Analysis
wordpress.org/plugins/appendadHelping publishers focus on content by freeing them from Ad-Tech and Ad-Operations with one line of code
Is FirstImpression.io Safe to Use in 2026?
Generally Safe
Score 85/100FirstImpression.io has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.
The "appendad" plugin v1.4.6 presents a mixed security posture. On the positive side, it exhibits no known vulnerabilities (CVEs), uses prepared statements for all its SQL queries, and does not engage in file operations or external HTTP requests. The absence of bundled libraries and critical taint flows is also encouraging. However, significant concerns arise from the static analysis. The plugin exposes one AJAX handler without any authentication checks, creating a direct entry point for potential exploitation. Furthermore, a substantial portion of its output is not properly escaped, leaving it vulnerable to cross-site scripting (XSS) attacks. The presence of a capability check suggests some attempt at access control, but its effectiveness is undermined by the unprotected AJAX endpoint.
Key Concerns
- Unprotected AJAX handler
- Unescaped output
FirstImpression.io Security Vulnerabilities
FirstImpression.io Release Timeline
FirstImpression.io Code Analysis
Output Escaping
FirstImpression.io Attack Surface
AJAX Handlers 1
WordPress Hooks 3
Maintenance & Trust
FirstImpression.io Maintenance & Trust
Maintenance Signals
Community Trust
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FirstImpression.io Developer Profile
1 plugin · 10 total installs
How We Detect FirstImpression.io
Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.
Asset Fingerprints
/wp-content/plugins/appendad/fab.js/wp-content/plugins/appendad/fi_client.js/wp-content/plugins/appendad/fi.js//ecdn.analysis.fi/static/js/fab.js//ecdn.firstimpression.io/fi_client.js//cdn.firstimpression.io/fi.jsHTML / DOM Fingerprints
asd_errorasd_savedvasu_btnBEGIN FIRSTIMPRESSION.IO TAGEND FIRSTIMPRESSION.IO TAGFirstImpression.io Targeting - StartFirstImpression.io Targeting - Enddata-plugin-versiondata-wp-versionid="apdPageData"id="fi-data-cfasync="false"window.apdAdminwindow.apd_options