TI-2021-08115 Aliases CVE-2021-26271 GHSA-jv4c-7jqq-m34x

It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by…

LOW 33CWE-829Published 2021-01-26 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution, Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-829 and CWE-1333.

Summary

It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted text into the Styles input of specific dialogs (in the Advanced Tab for Dialogs plugin).

Why it matters now

EPSS 0.01994 80th percentileScored 2026-11-07

Fix Fixed ckeditor4-dev (npm): 4.16

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA
—	ckeditor4-dev (npm)	before 4.16	4.16	Patch available	GHSA-jv4c-7jqq-m34x

— Vendor— Affected all versions Fixed in — No fix listed CNA
ckeditor4-dev (npm) Vendor— Affected before 4.16 Fixed in 4.16 Patch available GHSA-jv4c-7jqq-m34x

CPE configurations NVD · 11

CPE	Versions	Role	Vendor
cpe:2.3:a:ckeditor:ckeditor::::::::	4.0 to before 4.16	Vulnerable	ckeditor
cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.5:::::::*	9.3.5	Vulnerable	Oracle
cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.6:::::::*	9.3.6	Vulnerable	Oracle
cpe:2.3:a:oracle:application_express::::::::	before 21.1.0	Vulnerable	Oracle
cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure::::::::	8.0.6 – 8.0.9	Vulnerable	Oracle
cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:8.1.0:::::::*	8.1.0	Vulnerable	Oracle
cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:8.1.1:::::::*	8.1.1	Vulnerable	Oracle
cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools::::::::	before 9.2.6.0	Vulnerable	Oracle
cpe:2.3:a:oracle:siebel_ui_framework::::::::	before 21.9	Vulnerable	Oracle
cpe:2.3:a:oracle:webcenter_sites:12.2.1.3.0:::::::*	12.2.1.3.0	Vulnerable	Oracle

cpe:2.3:a:ckeditor:ckeditor:*:*:*:*:*:*:*:* Versions 4.0 to before 4.16 Vulnerable ·ckeditor
cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.5:*:*:*:*:*:*:* Versions 9.3.5 Vulnerable ·Oracle
cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.6:*:*:*:*:*:*:* Versions 9.3.6 Vulnerable ·Oracle
cpe:2.3:a:oracle:application_express:*:*:*:*:*:*:*:* Versions before 21.1.0 Vulnerable ·Oracle
cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:*:*:*:*:*:*:*:* Versions 8.0.6 – 8.0.9 Vulnerable ·Oracle
cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:8.1.0:*:*:*:*:*:*:* Versions 8.1.0 Vulnerable ·Oracle
cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:8.1.1:*:*:*:*:*:*:* Versions 8.1.1 Vulnerable ·Oracle
cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:* Versions before 9.2.6.0 Vulnerable ·Oracle
cpe:2.3:a:oracle:siebel_ui_framework:*:*:*:*:*:*:*:* Versions before 21.9 Vulnerable ·Oracle
cpe:2.3:a:oracle:webcenter_sites:12.2.1.3.0:*:*:*:*:*:*:* Versions 12.2.1.3.0 Vulnerable ·Oracle

Show 1 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:a:oracle:webcenter_sites:12.2.1.4.0:::::::*	12.2.1.4.0	Vulnerable	Oracle

cpe:2.3:a:oracle:webcenter_sites:12.2.1.4.0:*:*:*:*:*:*:* Versions 12.2.1.4.0 Vulnerable ·Oracle

Remediation

Fix · GHSA-jv4c-7jqq-m34x ckeditor4-dev (npm) Fixed in 4.16 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2021-26271
2026-10-03 Alias added: GHSA-jv4c-7jqq-m34x

References

Patch 2

Advisory 3

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences