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CVE

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 tex

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).

MEDIUM · CVSS 6.5 EPSS 0.00617
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-829Inclusion of Functionality from Untrusted Control Sphere
▤

Affected Products & Versions

8
ckeditor>= 4.0 and < 4.16
oracle agile plmall versions
oracle application express< 21.1.0
oracle financial services analytical applications infrastructure>= 8.0.6 and <= 8.0.9
oracle financial services analytical applications infrastructureall versions
oracle jd edwards enterpriseone tools< 9.2.6.0
oracle siebel ui framework< 21.9
oracle webcenter sitesall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
npm ckeditor4-dev MODERATE fixed in 4.16
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Jan 2021 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

1
oracle-cpuoracle-cpu-JD-Edwards-EnterpriseOne-Tools-4781--CVE-2021-26271
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-firstVendor Advisory
https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416Release NotesThird Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.htmlPatchThird Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatchThird Party Advisory
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