CVE-2025-15057Public exploitNetwork attack vector

Stored XSS via unescaped fingerprint log entry

Published Jan 9, 2026 · Updated Jan 9, 2026

Stored XSS in VeronaLabs SlimStat Analytics 5.3.3 and earlier allows remote attackers to execute scripts through the fh parameter. The plugin stores an unsanitized fingerprint value from a tracking request and renders it without output escaping in the Real-time Access Log. No authentication is required to plant the payload, but execution requires an administrator to view the affected report, exposing that browser session to attacker-controlled actions.

CVSS severity7.2
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in VeronaLabs SlimStat Analytics 5.3.3 and earlier allows remote attackers to execute scripts through the fh parameter. The plugin stores an unsanitized fingerprint value from a tracking request and renders it without output escaping in the Real-time Access Log. No authentication is required to plant the payload, but execution requires an administrator to view the affected report, exposing that browser session to attacker-controlled actions.

The record

CVE
CVE-2025-15057
Published
Jan 9, 2026
Updated
Jan 9, 2026
Vendor
VeronaLabs
Product
SlimStat Analytics
Classifications
CWE-79, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=* <=5.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

VeronaLabs · SlimStat Analyticsversion=* <=5.3.3

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

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Your stack

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