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Vulnerability details: VCID-wcfv-vjw6-6uh5
Vulnerability ID VCID-wcfv-vjw6-6uh5
Aliases CVE-2024-24815
GHSA-fq6h-4g8v-qqvm
Summary CKEditor4 Cross-site Scripting vulnerability caused by incorrect CDATA detection ### Affected packages The vulnerability has been discovered in the core HTML parsing module and may affect all editor instances that: * Enabled [full-page editing](https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.html) mode, * or enabled [CDATA](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdata) elements in [Advanced Content Filtering](https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.html) configuration (defaults to `script` and `style` elements). ### Impact A potential vulnerability has been discovered in CKEditor 4 HTML processing core module. The vulnerability allowed to inject malformed HTML content bypassing Advanced Content Filtering mechanism, which could result in executing JavaScript code. An attacker could abuse faulty CDATA content detection and use it to prepare an intentional attack on the editor. It affects all users using the CKEditor 4 at version < 4.24.0-lts. ### Patches The problem has been recognized and patched. The fix will be available in version 4.24.0-lts. ### For more information Email us at [security@cksource.com](mailto:security@cksource.com) if you have any questions or comments about this advisory. ### Acknowledgements The CKEditor 4 team would like to thank [Michal Frýba](https://cz.linkedin.com/in/michal-fryba) from [ALEF NULA](https://www.alefnula.com/) for recognizing and reporting this vulnerability.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00117 https://api.first.org/data/v1/epss?cve=CVE-2024-24815
cvssv3.1 6.1 https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdata
generic_textual MODERATE https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdata
ssvc Track https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdata
cvssv3.1 6.1 https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.html
generic_textual MODERATE https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.html
ssvc Track https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.html
cvssv3.1 6.1 https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.html
generic_textual MODERATE https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.html
ssvc Track https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.html
cvssv3.1 6.1 https://github.com/ckeditor/ckeditor4
generic_textual MODERATE https://github.com/ckeditor/ckeditor4
cvssv3.1 6.1 https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb
generic_textual MODERATE https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb
ssvc Track https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb
cvssv3.1 6.1 https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-fq6h-4g8v-qqvm
generic_textual MODERATE https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-fq6h-4g8v-qqvm
ssvc Track https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-fq6h-4g8v-qqvm
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2024-24815
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2024-24815
cvssv3.1 6.1 https://www.drupal.org/sa-contrib-2024-009
generic_textual MODERATE https://www.drupal.org/sa-contrib-2024-009
ssvc Track https://www.drupal.org/sa-contrib-2024-009
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2024-24815
https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdata
https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.html
https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-24815
https://github.com/ckeditor/ckeditor4
https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb
https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-fq6h-4g8v-qqvm
https://nvd.nist.gov/vuln/detail/CVE-2024-24815
https://www.drupal.org/sa-contrib-2024-009
1063536 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1063536
cpe:2.3:a:ckeditor:ckeditor:*:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:ckeditor:ckeditor:*:*:*:*:lts:*:*:*
GHSA-fq6h-4g8v-qqvm https://github.com/advisories/GHSA-fq6h-4g8v-qqvm
USN-7258-1 https://usn.ubuntu.com/7258-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdata
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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unchanged

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-02-08T16:41:58Z/ Found at https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdata
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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unchanged

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-02-08T16:41:58Z/ Found at https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-02-08T16:41:58Z/ Found at https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/ckeditor/ckeditor4
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

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high

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-02-08T16:41:58Z/ Found at https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-fq6h-4g8v-qqvm
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-02-08T16:41:58Z/ Found at https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-fq6h-4g8v-qqvm
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2024-24815
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

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low

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low

none

high

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.drupal.org/sa-contrib-2024-009
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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required

unchanged

changed

high

low

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-02-08T16:41:58Z/ Found at https://www.drupal.org/sa-contrib-2024-009
Exploit Prediction Scoring System (EPSS)
Percentile 0.3134
EPSS Score 0.00117
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:09:49.982940+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/02/GHSA-fq6h-4g8v-qqvm/GHSA-fq6h-4g8v-qqvm.json 36.1.3