The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `fh` (fingerprint) parameter in all versions up to, a...
Description
The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `fh` (fingerprint) parameter in all versions up to, and including, 5
AI Analyst Comment
Remediation
Update WordPress plugin/theme to the latest version. Review WordPress security settings and remove if no longer needed.
Description Summary:
The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the fh parameter, allowing unauthenticated attackers to inject malicious scripts into the admin dashboard.
Executive Summary:
A critical Stored Cross-Site Scripting vulnerability in the SlimStat Analytics plugin for WordPress allows unauthenticated attackers to execute arbitrary web scripts within the administrative interface.
Vulnerability Details
CVE-ID: CVE-2025-15057
Affected Software: Veronalabs SlimStat Analytics
Affected Versions: 0 through 5.3.3
Vulnerability: This vulnerability occurs due to insufficient input sanitization and output escaping of the fingerprint parameter. An unauthenticated attacker can inject malicious JavaScript that executes when an administrator views the Real-time Access Log report.
Business Impact
The ability to execute arbitrary scripts in the context of an administrator session poses a significant risk to organizational integrity. Successful exploitation could lead to account takeover, unauthorized administrative actions, or the theft of sensitive session data, justifying the high CVSS score of 7.2.
Remediation Plan
Immediate Action: Update the SlimStat Analytics plugin to version 5.3.4 or higher immediately to resolve the input sanitization flaw.
Proactive Monitoring: Review administrative access logs for suspicious activity or unauthorized script execution patterns within the WordPress dashboard.
Compensating Controls: Deploy a Web Application Firewall (WAF) with rules configured to block malicious script injection attempts targeting the fh parameter until the patch is applied.
Exploitation Status
Public Exploit Available: Unknown
Analyst Notes: As of January 10, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently dangerous due to its unauthenticated nature and the high privilege context in which the payload executes.
Analyst Recommendation
Given the potential for unauthorized administrative access, organizations utilizing the SlimStat Analytics plugin must prioritize this update. Failure to remediate this vulnerability leaves the WordPress management interface exposed to malicious script injection, which could facilitate broader compromise of the application environment.