CVE-2021-26271
MEDIUM
6.5
CVSS Score
Published: January 26, 2021 at 08:39 PM UTC
Updated: August 25, 2026 at 04:28 PM UTC
7 products affected across 2 vendorsJD Edwards EnterpriseOne ToolsAgile Product Lifecycle ManagementWebCenter Sites
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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%
Description
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).
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Ckeditor· Ckeditordrupal
95%4.0 ≤ v < 4.16
Affected range stops below 4.16, so it looks safe — our inference, not a vendor statement
95%
v < 21.1.0
Affected range stops below 21.1.0, so it looks safe — our inference, not a vendor statement
v < 9.2.6.0
Affected range stops below 9.2.6.0, so it looks safe — our inference, not a vendor statement
95%
v < 21.9
Affected range stops below 21.9, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
x_refsource_CONFIRMx_refsource_MISCVendor Advisory
Source: [email protected]
https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-firstx_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://www.oracle.com//security-alerts/cpujul2021.htmlx_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://www.oracle.com/security-alerts/cpuoct2021.htmlCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-829
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