Copyscape Premium Security & Risk Analysis

wordpress.org/plugins/copyscape-premium

The Copyscape Premium plugin lets you check if a WordPress post is unique before it's published, by searching for duplicate content on the web.

1K active installs v1.4.2 PHP + WP 3.0.1+ Updated Dec 24, 2025
copyscapeduplicate-contentoriginalplagiarismunique
98
A · Safe
CVEs total2
Unpatched0
Last CVEJan 10, 2026
Safety Verdict

Is Copyscape Premium Safe to Use in 2026?

Generally Safe

Score 98/100

Copyscape Premium has a strong security track record. Known vulnerabilities have been patched promptly.

2 known CVEsLast CVE: Jan 10, 2026Updated 3mo ago
Risk Assessment

The 'copyscape-premium' v1.4.2 plugin exhibits a mixed security posture. While it demonstrates strengths in its limited attack surface, particularly with zero unprotected entry points, and a reasonable adoption of prepared statements for SQL queries, significant concerns arise from its output escaping and taint analysis. The low percentage of properly escaped output (30%) suggests a high risk of cross-site scripting (XSS) vulnerabilities across various parts of the plugin. The presence of a single flow with unsanitized paths, even if not classified as critical or high severity in this scan, represents a potential avenue for attackers to exploit the plugin by manipulating input that affects file operations or other sensitive processes. The vulnerability history, while showing no currently unpatched issues, indicates a past pattern of medium severity vulnerabilities, primarily CSRF, suggesting the developers have addressed issues but the code may have inherent complexities that lead to such vulnerabilities. This highlights a need for continued vigilance and thorough code reviews.

Key Concerns

  • Low percentage of properly escaped output
  • Flow with unsanitized paths
  • Past medium severity vulnerabilities
Vulnerabilities
2

Copyscape Premium Security Vulnerabilities

CVEs by Year

1 CVE in 2024
2024
1 CVE in 2026
2026
Patched Has unpatched

Severity Breakdown

Medium
2

2 total CVEs

CVE-2026-24966medium · 4.3Cross-Site Request Forgery (CSRF)

Copyscape Premium <= 1.4.1 - Cross-Site Request Forgery

Jan 10, 2026 Patched in 1.4.2 (32d)
CVE-2024-47644medium · 6.1Cross-Site Request Forgery (CSRF)

Copyscape Premium <= 1.3.8 - Cross-Site Request Forgery

Sep 30, 2024 Patched in 1.4.0 (33d)
Code Analysis
Analyzed Mar 16, 2026

Copyscape Premium Code Analysis

Dangerous Functions
0
Raw SQL Queries
9
26 prepared
Unescaped Output
26
11 escaped
Nonce Checks
4
Capability Checks
7
File Operations
0
External Requests
1
Bundled Libraries
0

SQL Query Safety

74% prepared35 total queries

Output Escaping

30% escaped37 total outputs
Data Flows
1 unsanitized

Data Flow Analysis

3 flows1 with unsanitized paths
copyscape_options (copyscape.php:205)
Source (user input) Sink (dangerous op) Sanitizer Transform Unsanitized Sanitized
Attack Surface

Copyscape Premium Attack Surface

Entry Points1
Unprotected0

AJAX Handlers 1

authwp_ajax_copyscape_checkcopyscape.php:41
WordPress Hooks 9
filterpost_updated_messagescopyscape.php:30
actionadmin_enqueue_scriptscopyscape.php:33
actiontransition_post_statuscopyscape.php:34
actionadmin_menucopyscape.php:35
actionadmin_noticescopyscape.php:36
actionplugins_loadedcopyscape.php:37
actionadmin_initcopyscape.php:38
actionadmin_initcopyscape.php:39
actioninitcopyscape.php:40
Maintenance & Trust

Copyscape Premium Maintenance & Trust

Maintenance Signals

WordPress version tested6.9.4
Last updatedDec 24, 2025
PHP min version
Downloads53K

Community Trust

Rating64/100
Number of ratings10
Active installs1K
Developer Profile

Copyscape Premium Developer Profile

Copyscape

1 plugin · 1K total installs

87
trust score
Avg Security Score
98/100
Avg Patch Time
33 days
View full developer profile
Detection Fingerprints

How We Detect Copyscape Premium

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

Asset Fingerprints

Asset Paths
/wp-content/plugins/copyscape-premium/css/copyscape-premium.css/wp-content/plugins/copyscape-premium/js/copyscape-premium.js
Script Paths
/wp-content/plugins/copyscape-premium/js/copyscape-premium.js
Version Parameters
copyscape-premium/css/copyscape-premium.css?ver=copyscape-premium/js/copyscape-premium.js?ver=

HTML / DOM Fingerprints

CSS Classes
copyscape-premium-wrap
HTML Comments
Copyscape Premium plugin - AJAX request handler.Copyscape Premium plugin - AJAX request handler.Copyscape Premium plugin - AJAX request handler.
Data Attributes
data-copyscape-noncedata-copyscape-action
JS Globals
copyscape_premium_ajax_object
REST Endpoints
/wp-json/copyscape-premium/v1/check
FAQ

Frequently Asked Questions about Copyscape Premium