CVE-2023-37905Network attack vector

Script execution via innerHTML-based text extraction

Published Jul 21, 2023 · Updated Oct 21, 2024

Cross-site scripting in w8tcha CKEditor WordCount Plugin before 1.17.12 allows remote attackers to execute script through source mode. The wordcount/plugin.js text-extraction path assigns filtered editor HTML to a detached div's innerHTML, causing embedded markup to execute during word counting. Exploitation requires a user to switch the editor to source mode; TYPO3 normally also requires an authenticated backend account, but frontend integrations that reflect submitted rich text can expose the flaw without authentication.

CVSS severity6.1
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in w8tcha CKEditor WordCount Plugin before 1.17.12 allows remote attackers to execute script through source mode. The wordcount/plugin.js text-extraction path assigns filtered editor HTML to a detached div's innerHTML, causing embedded markup to execute during word counting. Exploitation requires a user to switch the editor to source mode; TYPO3 normally also requires an authenticated backend account, but frontend integrations that reflect submitted rich text can expose the flaw without authentication.

The record

CVE
CVE-2023-37905
Published
Jul 21, 2023
Updated
Oct 21, 2024
Vendor
w8tcha
Product
CKEditor WordCount Plugin
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 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=< 1.17.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

w8tcha · CKEditor WordCount Pluginversion=< 1.17.12
TYPO3 Association · TYPO3 RTE by CKEditorversion=>= 10.0.0, < 10.4.39; version=>= 11.0.0, < 11.5.30

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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