{"cve":{"cve_id":"CVE-2021-26272","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.02223,"epss_percentile":0.81387,"epss_as_of":"2026-08-26","description":"It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted URL-like text into the editor, and then press Enter or Space (in the Autolink plugin).","published_at":"2021-01-26T20:39:56Z","last_modified_at":"2026-08-25T16:28:27.310000Z","cvss_v3_score":6.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-829"],"nvd_references":["https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416","https://www.oracle.com//security-alerts/cpujul2021.html","https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first","https://www.oracle.com/security-alerts/cpuoct2021.html","https://www.oracle.com/security-alerts/cpujan2022.html"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-08-26T09:05:04.768478Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"R","value_label":"Required"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"ckeditor","vendor_name":"ckeditor","product_slug":"ckeditor","product_name":"ckeditor","version_start":"4.0","version_start_inclusive":true,"version_end":"4.16","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:ckeditor:ckeditor:*:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"agile-product-lifecycle-management","product_name":"agile_product_lifecycle_management","version_start":"9.3.5","version_start_inclusive":true,"version_end":"9.3.5","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.5:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"agile-product-lifecycle-management","product_name":"agile_product_lifecycle_management","version_start":"9.3.6","version_start_inclusive":true,"version_end":"9.3.6","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.6:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"application-express","product_name":"application_express","version_start":null,"version_start_inclusive":null,"version_end":"21.1.0","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:oracle:application_express:*:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"banking-party-management","product_name":"banking_party_management","version_start":"2.7.0","version_start_inclusive":true,"version_end":"2.7.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:banking_party_management:2.7.0:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"commerce-merchandising","product_name":"commerce_merchandising","version_start":"11.3.0","version_start_inclusive":true,"version_end":"11.3.2","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:commerce_merchandising:*:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"commerce-merchandising","product_name":"commerce_merchandising","version_start":"11.1.0","version_start_inclusive":true,"version_end":"11.1.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:commerce_merchandising:11.1.0:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"commerce-merchandising","product_name":"commerce_merchandising","version_start":"11.2.0","version_start_inclusive":true,"version_end":"11.2.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:commerce_merchandising:11.2.0:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"financial-services-analytical-applications-infrastructure","product_name":"financial_services_analytical_applications_infrastructure","version_start":"8.0.6","version_start_inclusive":true,"version_end":"8.0.9","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:*:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"financial-services-analytical-applications-infrastructure","product_name":"financial_services_analytical_applications_infrastructure","version_start":"8.1.0","version_start_inclusive":true,"version_end":"8.1.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:8.1.0:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"financial-services-analytical-applications-infrastructure","product_name":"financial_services_analytical_applications_infrastructure","version_start":"8.1.1","version_start_inclusive":true,"version_end":"8.1.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:8.1.1:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"financial-services-model-management-and-governance","product_name":"financial_services_model_management_and_governance","version_start":"8.0.8.0.0","version_start_inclusive":true,"version_end":"8.1.0.0.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:financial_services_model_management_and_governance:*:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"jd-edwards-enterpriseone-tools","product_name":"jd_edwards_enterpriseone_tools","version_start":null,"version_start_inclusive":null,"version_end":"9.2.6.0","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"siebel-ui-framework","product_name":"Siebel UI Framework","version_start":null,"version_start_inclusive":null,"version_end":"21.9","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:siebel_ui_framework:*:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"webcenter-sites","product_name":"webcenter_sites","version_start":"12.2.1.3.0","version_start_inclusive":true,"version_end":"12.2.1.3.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:webcenter_sites:12.2.1.3.0:*:*:*:*:*:*:*"},{"vendor_slug":"oracle","vendor_name":"oracle","product_slug":"webcenter-sites","product_name":"webcenter_sites","version_start":"12.2.1.4.0","version_start_inclusive":true,"version_end":"12.2.1.4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:oracle:webcenter_sites:12.2.1.4.0:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416","source_type":"MISC","tags":[]},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first","source_type":"MISC","tags":[]},{"url":"https://www.oracle.com/security-alerts/cpuoct2021.html","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://www.oracle.com/security-alerts/cpujan2022.html","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2021-01-26T20:39:56Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-08-25T19:35:50.379874Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-08-25T19:35:50.379874Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-08-25T19:35:50.379874Z","label":"CVSS score revised","source":"nvd"}]}