CVE-2025-15055CWE-79

SlimStat Analytics <= 5.3.4 - Unauthenticated Stored Cross-Site Scripting via 'notes/resource' Parameters

High · published January 9, 2026

CVSS v3.1
7.2
EPSS
0%
Percentile
18.8
In the wild
Unconfirmed
What it is

⚡ Unauthenticated attackers can effortlessly inject scripts into your WordPress site! All versions of the SlimStat Analytics plugin up to 5.3.4 are vulnerable to a Stored XSS flaw that could have devastating consequences. 🔥 Think of it like a guest book at a cafe where anyone can scribble notes for the staff to read. If someone writes a nasty message in a hidden corner and the staff never checks it, that message could cause chaos when they finally do! If exploited, an attacker could inject malicious scripts that execute whenever an administrator views the Recent Custom Events report. This means sensitive information could be exposed, session hijacking could occur, or even complete control of the site could be compromised — talk about a digital disaster!

Put simply

Think of it like a guest book at a cafe where anyone can scribble notes for the staff to read. If someone writes a nasty message in a hidden corner and the staff never checks it, that message could cause chaos when they finally do! This vulnerability stems from insufficient input sanitization and output escaping in the 'notes' and 'resource' parameters, allowing unauthenticated users to inject arbitrary scripts that run in the context of the administrator's session.

What to do

If exploited, an attacker could inject malicious scripts that execute whenever an administrator views the Recent Custom Events report. This means sensitive information could be exposed, session hijacking could occur, or even complete control of the site could be compromised — talk about a digital disaster! To protect your site, update the SlimStat Analytics plugin immediately to version 5.3.5 or later. Additionally, audit your site's input sanitization practices to prevent similar vulnerabilities. Don't forget to check for other security enhancements you can apply! You've got this! Take these steps, and you'll have your security locked down in no time. 🛡️

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00274 · 18.8th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-01-09T06:34Z
EPSS history
Timeline
  • 09 JAN 06:34Z
    SlimStat Analytics <= 5.3.4 - Unauthenticated Stored Cross-Site Scripting via 'notes/resource' Parameters
    cvelistv5