CVE-2023-4597Network attack vector

Stored XSS via unescaped shortcode class attribute

Published Aug 30, 2023 · Updated Apr 8, 2026

Stored XSS in VeronaLabs SlimStat Analytics 5.0.9 and earlier allows remote authenticated users to inject scripts via a shortcode. The slimstat_shortcode method accepts the top-all type's user-controlled w attribute and concatenates it into a ul class value without sanitization or output escaping. Contributor-level access is required to save the shortcode in a page or post; the injected script runs whenever a user views that content.

CVSS severity6.4
Medium
EPSS probability0.67%
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 5.0.9 and earlier allows remote authenticated users to inject scripts via a shortcode. The slimstat_shortcode method accepts the top-all type's user-controlled w attribute and concatenates it into a ul class value without sanitization or output escaping. Contributor-level access is required to save the shortcode in a page or post; the injected script runs whenever a user views that content.

The record

CVE
CVE-2023-4597
Published
Aug 30, 2023
Updated
Apr 8, 2026
Vendor
VeronaLabs
Product
SlimStat Analytics
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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=0 <=5.0.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

VeronaLabs · SlimStat Analyticsversion=0 <=5.0.9

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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Your stack

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