CVE-2026-1238Network attack vector

Unauthenticated stored XSS via unescaped fingerprint

Published Mar 19, 2026 · Updated Mar 19, 2026

Stored XSS in VeronaLabs SlimStat Analytics 5.3.5 and earlier allows remote attackers to inject scripts through the fh parameter. The visitor tracker stores the insufficiently sanitized fingerprint value, and the Right Now administration view renders it without appropriate output escaping. No authentication is required to plant a payload; execution occurs when a user accesses the affected analytics view, exposing that browser session to attacker-controlled script actions.

CVSS severity7.2
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in VeronaLabs SlimStat Analytics 5.3.5 and earlier allows remote attackers to inject scripts through the fh parameter. The visitor tracker stores the insufficiently sanitized fingerprint value, and the Right Now administration view renders it without appropriate output escaping. No authentication is required to plant a payload; execution occurs when a user accesses the affected analytics view, exposing that browser session to attacker-controlled script actions.

The record

CVE
CVE-2026-1238
Published
Mar 19, 2026
Updated
Mar 19, 2026
Vendor
VeronaLabs
Product
SlimStat Analytics
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=5.3.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

VeronaLabs · SlimStat Analyticsversion=* <=5.3.5

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo