CVE-2025-15057

Unknown Unknown - Not Provided

BaseFortify

Publication date: 2026-01-09

Last updated on: 2026-01-09

Assigner: Wordfence

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, 5.3.3. This is due to insufficient input sanitization and output escaping on the fingerprint value stored in the database. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator views the Real-time Access Log report.

CVSS Scores

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Meta Information

Published

2026-01-09

Last Modified

2026-01-09

Generated

2026-07-06

AI Q&A

2026-01-10

EPSS Evaluated

2026-07-05

NVD

CVE-2025-15057

EUVD

EUVD-2026-1792

Affected Vendors & Products

Vendor	Product	Version / Range
unknown_vendor	wp-slimstat	to 5.3.3 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in the SlimStat Analytics WordPress plugin (versions up to 5.3.3). It occurs because the plugin does not properly sanitize or escape the 'fh' (fingerprint) parameter before storing it in the database. As a result, an unauthenticated attacker can inject malicious scripts that will execute when an administrator views the Real-time Access Log report in the plugin's admin interface. [1]

Impact Analysis

The vulnerability allows unauthenticated attackers to inject arbitrary web scripts that execute in the context of an administrator's browser when they view the Real-time Access Log report. This can lead to theft of administrator credentials, session hijacking, or other malicious actions performed with administrator privileges, potentially compromising the entire WordPress site. [1]

Mitigation Strategies

Update the SlimStat Analytics WordPress plugin to version 5.3.4 or later, as this version includes security hardening that fixes the stored cross-site scripting vulnerability by improving input sanitization and output escaping. Ensure your PHP version is 7.4 or higher as required by the updated plugin. [1]

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