f(x) SEO Security & Risk Analysis

wordpress.org/plugins/fx-seo

Very simple SEO plugin.

10 active installs v1.1.0 PHP + WP 4.1+ Updated Aug 1, 2016
seo
85
A · Safe
CVEs total0
Unpatched0
Last CVENever
Safety Verdict

Is f(x) SEO Safe to Use in 2026?

Generally Safe

Score 85/100

f(x) SEO has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.

No known CVEs Updated 9yr ago
Risk Assessment

The fx-seo plugin v1.1.0 exhibits a generally good security posture based on the static analysis. The absence of identified dangerous functions, file operations, external HTTP requests, and SQL queries not using prepared statements are positive indicators. Furthermore, the lack of any recorded CVEs, past or present, suggests a relatively stable security history for this plugin. The static analysis also indicates a zero attack surface and zero taint flows, which are excellent signs of well-secured code entry points and data handling. However, a notable concern is the low percentage of properly escaped output (32%). This could leave the plugin vulnerable to cross-site scripting (XSS) attacks if user-supplied data is displayed without adequate sanitization, particularly if any of the output points are indirectly exposed through other means. While the current attack surface appears minimal, a low output escaping rate is a significant weakness that warrants attention.

Key Concerns

  • Low output escaping percentage
Vulnerabilities
None known

f(x) SEO Security Vulnerabilities

No known vulnerabilities — this is a good sign.
Code Analysis
Analyzed Mar 17, 2026

f(x) SEO Code Analysis

Dangerous Functions
0
Raw SQL Queries
0
0 prepared
Unescaped Output
15
7 escaped
Nonce Checks
0
Capability Checks
0
File Operations
0
External Requests
0
Bundled Libraries
0

Output Escaping

32% escaped22 total outputs
Attack Surface

f(x) SEO Attack Surface

Entry Points0
Unprotected0
WordPress Hooks 8
actionplugins_loadedfx-seo.php:42
filterwp_titleincludes\functions.php:96
filterpre_get_document_titleincludes\functions.php:97
actionwp_headincludes\functions.php:100
actionadmin_menuincludes\settings.php:48
actionadmin_initincludes\settings.php:51
actionadmin_enqueue_scriptsincludes\settings.php:74
actionadmin_noticesincludes\settings.php:79
Maintenance & Trust

f(x) SEO Maintenance & Trust

Maintenance Signals

WordPress version tested4.7.32
Last updatedAug 1, 2016
PHP min version
Downloads2K

Community Trust

Rating0/100
Number of ratings0
Active installs10
Developer Profile

f(x) SEO Developer Profile

David Chandra Purnama

12 plugins · 2K total installs

82
trust score
Avg Security Score
83/100
Avg Patch Time
30 days
View full developer profile
Detection Fingerprints

How We Detect f(x) SEO

Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.

Asset Fingerprints

Asset Paths
/wp-content/plugins/fx-seo/css/settings.css
Version Parameters
fx-seo/css/settings.css?ver=1.1.0

HTML / DOM Fingerprints

CSS Classes
wrap
HTML Comments
<!-- do not access this file directly --><!-- Settings Page Slug --><!-- Settings Page Hook Name --><!-- Options Group -->+50 more
Data Attributes
name="fx-seo"id="fx_seo_front_page_title"id="fx_seo_front_page_meta_description"id="fx_seo_template_title"id="fx_seo_template_meta_description"
FAQ

Frequently Asked Questions about f(x) SEO