Vulnerability Monitor

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CVE-2021-26271


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).


Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 7 products from ckeditor, from oracle, from oracle and 4 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2021-01-26T21:15:12.860

Last Modified

2024-11-21T05:56:00.720

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

8.6

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-829

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application ckeditor ckeditor < 4.16 Yes
Application oracle agile_plm 9.3.5 Yes
Application oracle agile_plm 9.3.6 Yes
Application oracle application_express < 21.1.0 Yes
Application oracle financial_services_analytical_applications_infrastructure ≤ 8.0.9 Yes
Application oracle financial_services_analytical_applications_infrastructure 8.1.0 Yes
Application oracle financial_services_analytical_applications_infrastructure 8.1.1 Yes
Application oracle jd_edwards_enterpriseone_tools < 9.2.6.0 Yes
Application oracle siebel_ui_framework < 21.9 Yes
Application oracle webcenter_sites 12.2.1.3.0 Yes
Application oracle webcenter_sites 12.2.1.4.0 Yes

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For ckeditor's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.