CVE-2023-3170Public exploitNetwork attack vector

Stored script execution via unescaped Custom CSS

Published Sep 11, 2023 · Updated Sep 26, 2024

Stored XSS in tagDiv Composer before 4.2 allows remote authenticated users with Administrator privileges to execute JavaScript in visitors' browsers. The Theme Panel's Custom CSS setting stores an unvalidated, unescaped closing style tag and HTML payload that the site front end renders. An Administrator account is required, and the issue remains reachable when WordPress multisite removes the unfiltered_html capability.

CVSS severity4.8
Medium
EPSS probability0.44%
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 tagDiv Composer before 4.2 allows remote authenticated users with Administrator privileges to execute JavaScript in visitors' browsers. The Theme Panel's Custom CSS setting stores an unvalidated, unescaped closing style tag and HTML payload that the site front end renders. An Administrator account is required, and the issue remains reachable when WordPress multisite removes the unfiltered_html capability.

The record

CVE
CVE-2023-3170
Published
Sep 11, 2023
Updated
Sep 26, 2024
Vendor
tagDiv
Product
tagDiv Composer
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 2024Record 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 <4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

tagDiv · tagDiv Composerversion=0 <4.2

Published CVSS scores

4.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
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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