CVE-2024-24816Public exploitNetwork attack vector

JavaScript execution via unsanitized preview content

Published Feb 7, 2024 · Updated Aug 1, 2024

Cross-site scripting in CKEditor 4 before 4.24.0-lts allows remote attackers to execute JavaScript through preview samples. Affected sample pages pass editor-controlled HTML to Preview without sanitizing the contentPreview event data before browser rendering. Exploitation requires an affected sample page to be deployed in production with Preview enabled and a user to open attacker-supplied content.

CVSS severity6.1
Medium
EPSS probability1.65%
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 CKEditor 4 before 4.24.0-lts allows remote attackers to execute JavaScript through preview samples. Affected sample pages pass editor-controlled HTML to Preview without sanitizing the contentPreview event data before browser rendering. Exploitation requires an affected sample page to be deployed in production with Preview enabled and a user to open attacker-supplied content.

The record

CVE
CVE-2024-24816
Published
Feb 7, 2024
Updated
Aug 1, 2024
Vendor
CKSource
Product
CKEditor 4
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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=< 4.24.0-lts

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CKSource · CKEditor 4version=< 4.24.0-lts

Published CVSS scores

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 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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