CVE-2024-45613Network attack vector

JavaScript execution via crafted editor content

Published Sep 25, 2024 · Updated Oct 1, 2024

Cross-site scripting in the CKEditor 5 clipboard package 40.0.0 through 43.1.0 allows attackers to execute JavaScript through crafted editor content. CKSource has not published the faulty clipboard operation or how crafted content bypasses its handling. Exploitation requires a specific user action, the Block Toolbar plugin, and either HTML Embed or General HTML Support configured to permit unsafe markup.

CVSS severity5.1
Medium
EPSS probability0.52%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in the CKEditor 5 clipboard package 40.0.0 through 43.1.0 allows attackers to execute JavaScript through crafted editor content. CKSource has not published the faulty clipboard operation or how crafted content bypasses its handling. Exploitation requires a specific user action, the Block Toolbar plugin, and either HTML Embed or General HTML Support configured to permit unsafe markup.

The record

CVE
CVE-2024-45613
Published
Sep 25, 2024
Updated
Oct 1, 2024
Vendor
CKSource
Product
CKEditor 5
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 40.0.0, < 43.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CKSource · CKEditor 5version=>= 40.0.0, < 43.1.1

Published CVSS scores

5.1GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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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