CVE-2024-4094Public exploitNetwork attack vector

Stored XSS via unescaped Additional CSS

Published Jun 18, 2024 · Updated Mar 18, 2025

Stored XSS in ShareThis Simple Share Buttons Adder before 8.5.1 allows remote authenticated users to inject script through Additional CSS. The settings handler stores unsanitized Additional CSS and emits it into a style element without escaping, so a closing style tag becomes executable markup. Editor-level access is sufficient even when unfiltered_html is disabled, and script execution occurs when an affected page reloads.

CVSS severity5.4
Medium
EPSS probability0.40%
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 ShareThis Simple Share Buttons Adder before 8.5.1 allows remote authenticated users to inject script through Additional CSS. The settings handler stores unsanitized Additional CSS and emits it into a style element without escaping, so a closing style tag becomes executable markup. Editor-level access is sufficient even when unfiltered_html is disabled, and script execution occurs when an affected page reloads.

The record

CVE
CVE-2024-4094
Published
Jun 18, 2024
Updated
Mar 18, 2025
Vendor
Simple Share Buttons
Product
Simple Share Buttons Adder
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2025Record 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 <8.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Simple Share Buttons · Simple Share Buttons Adderversion=0 <8.5.1

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/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 exploitPublished

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

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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