Fail2WP Security & Risk Analysis

wordpress.org/plugins/fail2wp

Security plugin for WordPress with support for fail2ban. Tested with WordPress 5.5+ and PHP 7.4-8.4

100 active installs v1.2.5 PHP 7.4+ WP 5.4.0+ Updated Mar 13, 2026
adminauthenticationfail2banfirewallsecurity
100
A · Safe
CVEs total0
Unpatched0
Last CVENever
Safety Verdict

Is Fail2WP Safe to Use in 2026?

Generally Safe

Score 100/100

Fail2WP has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.

No known CVEs Updated 22d ago
Risk Assessment

The "fail2wp" plugin v1.2.6 presents a generally positive security posture based on the provided static analysis. The plugin demonstrates good practices by having a very small attack surface with no identified AJAX handlers, REST API routes, shortcodes, or cron events exposed without proper authentication. The absence of dangerous functions and critical/high severity taint flows is also a strong indicator of secure coding. Furthermore, the plugin's vulnerability history is clean, with no recorded CVEs, suggesting a history of stable and secure development.

However, a notable concern arises from the SQL queries. While there's only one query identified, the fact that 0% of them use prepared statements represents a significant risk. This could potentially lead to SQL injection vulnerabilities if the query's inputs are not meticulously sanitized elsewhere, which is not explicitly confirmed or denied by the available taint analysis. The significant number of output operations (195) with only 48% properly escaped also indicates a potential for cross-site scripting (XSS) vulnerabilities, although no specific instances were flagged in the taint analysis. The plugin's reliance on capability checks (19) and nonce checks (2) is good, but the single external HTTP request warrants investigation to ensure it's handled securely.

Key Concerns

  • SQL queries not using prepared statements
  • Low percentage of properly escaped output
Vulnerabilities
None known

Fail2WP Security Vulnerabilities

No known vulnerabilities — this is a good sign.
Code Analysis
Analyzed Mar 16, 2026

Fail2WP Code Analysis

Dangerous Functions
0
Raw SQL Queries
1
0 prepared
Unescaped Output
101
94 escaped
Nonce Checks
2
Capability Checks
19
File Operations
0
External Requests
1
Bundled Libraries
0

SQL Query Safety

0% prepared1 total queries

Output Escaping

48% escaped195 total outputs
Data Flows
All sanitized

Data Flow Analysis

2 flows
fail2wp_settings_loginip_callback (fail2wp.php:2210)
Source (user input) Sink (dangerous op) Sanitizer Transform Unsanitized Sanitized
Attack Surface

Fail2WP Attack Surface

Entry Points0
Unprotected0
WordPress Hooks 36
actionadmin_noticesfail2wp.php:404
actionplugins_loadedfail2wp.php:405
actionadmin_noticesfail2wp.php:413
actionadmin_noticesfail2wp.php:415
actionadmin_noticesfail2wp.php:417
filterregistration_errorsfail2wp.php:442
filterrest_authentication_errorsfail2wp.php:452
actionrest_api_initfail2wp.php:601
filterthe_generatorfail2wp.php:607
filterfeed_links_show_posts_feedfail2wp.php:611
filterfeed_links_show_comments_feedfail2wp.php:612
actiondo_feedfail2wp.php:624
actiondo_feed_rdffail2wp.php:625
actiondo_feed_rssfail2wp.php:626
actiondo_feed_rss2fail2wp.php:627
actiondo_feed_atomfail2wp.php:628
actiondo_feed_rss2_commentsfail2wp.php:629
actiondo_feed_atom_commentsfail2wp.php:630
filterrest_indexfail2wp.php:811
filterrest_pre_dispatchfail2wp.php:822
filtergettextfail2wp.php:3246
actionwp_loginfail2wp.php:3788
actionwp_login_failedfail2wp.php:3789
filterlogin_errorsfail2wp.php:3790
filterauthenticatefail2wp.php:3793
actionlogin_headfail2wp.php:3794
actionlogin_headfail2wp.php:3798
filterwp_xmlrpc_server_classfail2wp.php:3808
filterxmlrpc_enabledfail2wp.php:3816
filterxmlrpc_methodsfail2wp.php:3823
actioninitfail2wp.php:4062
actionadmin_enqueue_scriptsfail2wp.php:4066
actionadmin_menufail2wp.php:4067
actionadmin_initfail2wp.php:4068
actionwp_loadedfail2wp.php:4071
actionparse_requestfail2wp.php:4075
Maintenance & Trust

Fail2WP Maintenance & Trust

Maintenance Signals

WordPress version tested6.9.4
Last updatedMar 13, 2026
PHP min version7.4
Downloads3K

Community Trust

Rating100/100
Number of ratings2
Active installs100
Developer Profile

Fail2WP Developer Profile

joho68

5 plugins · 190 total installs

94
trust score
Avg Security Score
100/100
Avg Patch Time
30 days
View full developer profile
Detection Fingerprints

How We Detect Fail2WP

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

Asset Fingerprints

Asset Paths
/wp-content/plugins/fail2wp/css/fail2wp-admin-styles.css/wp-content/plugins/fail2wp/css/fail2wp-styles.css/wp-content/plugins/fail2wp/js/fail2wp-admin-scripts.js/wp-content/plugins/fail2wp/js/fail2wp-scripts.js
Script Paths
/wp-content/plugins/fail2wp/js/fail2wp-admin-scripts.js/wp-content/plugins/fail2wp/js/fail2wp-scripts.js
Version Parameters
fail2wp/css/fail2wp-admin-styles.css?ver=fail2wp/css/fail2wp-styles.css?ver=fail2wp/js/fail2wp-admin-scripts.js?ver=fail2wp/js/fail2wp-scripts.js?ver=

HTML / DOM Fingerprints

CSS Classes
fail2wp-sectionfail2wp-settings-wrapfail2wp-sub-settings-wrapfail2wp-sub-settings-sectionfail2wp-settings-blockfail2wp-log-wrapfail2wp-log-messagefail2wp-log-header+11 more
HTML Comments
<!-- FAIL2WP_REST_DEBUG --><!-- FAIL2WP_GENERAL_DEBUG --><!-- FAIL2WP_FLOW_DEBUG --><!-- FAIL2WP_CACHE_DEBUG -->+3 more
Data Attributes
data-fail2wp-actiondata-fail2wp-noncedata-fail2wp-url
JS Globals
fail2wp_admin_params
REST Endpoints
/wp-json/fail2wp/v1/settings/wp-json/fail2wp/v1/log/get/wp-json/fail2wp/v1/log/clear/wp-json/fail2wp/v1/log/delete/wp-json/fail2wp/v1/ban/add/wp-json/fail2wp/v1/ban/delete/wp-json/fail2wp/v1/ban/get
FAQ

Frequently Asked Questions about Fail2WP