CVE-2021-26271
CKEditor 4 Denial of Service Vuln
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).
INFO
Published Date :
Jan. 26, 2021, 9:15 p.m.
Last Modified :
Nov. 21, 2024, 5:56 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2021-26271
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-26271.
| URL | Resource |
|---|---|
| https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first | Vendor Advisory |
| https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416 | Release Notes Third Party Advisory |
| https://www.oracle.com//security-alerts/cpujul2021.html | Patch Third Party Advisory |
| https://www.oracle.com/security-alerts/cpuoct2021.html | Patch Third Party Advisory |
| https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first | Vendor Advisory |
| https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416 | Release Notes Third Party Advisory |
| https://www.oracle.com//security-alerts/cpujul2021.html | Patch Third Party Advisory |
| https://www.oracle.com/security-alerts/cpuoct2021.html | Patch Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-26271 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-26271
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-26271 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-26271 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first Added Reference https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416 Added Reference https://www.oracle.com//security-alerts/cpujul2021.html Added Reference https://www.oracle.com/security-alerts/cpuoct2021.html -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Dec. 01, 2021
Action Type Old Value New Value Changed Reference Type https://www.oracle.com//security-alerts/cpujul2021.html No Types Assigned https://www.oracle.com//security-alerts/cpujul2021.html Patch, Third Party Advisory Changed Reference Type https://www.oracle.com/security-alerts/cpuoct2021.html No Types Assigned https://www.oracle.com/security-alerts/cpuoct2021.html Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:oracle:agile_plm:9.3.5:*:*:*:*:*:*:* *cpe:2.3:a:oracle:agile_plm:9.3.6:*:*:*:*:*:*:* *cpe:2.3:a:oracle:application_express:*:*:*:*:*:*:*:* versions up to (excluding) 21.1.0 *cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:*:*:*:*:*:*:*:* versions from (including) 8.0.6 up to (including) 8.0.9 *cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:8.1.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:8.1.1:*:*:*:*:*:*:* *cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:* versions up to (excluding) 9.2.6.0 *cpe:2.3:a:oracle:siebel_ui_framework:*:*:*:*:*:*:*:* versions up to (excluding) 21.9 *cpe:2.3:a:oracle:webcenter_sites:12.2.1.3.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:webcenter_sites:12.2.1.4.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 20, 2021
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpuoct2021.html [No Types Assigned] -
CVE Modified by [email protected]
Jul. 20, 2021
Action Type Old Value New Value Added Reference https://www.oracle.com//security-alerts/cpujul2021.html [No Types Assigned] -
Modified Analysis by [email protected]
Feb. 08, 2021
Action Type Old Value New Value Changed Reference Type https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first No Types Assigned https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first Vendor Advisory -
CVE Modified by [email protected]
Feb. 04, 2021
Action Type Old Value New Value Added Reference https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 02, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416 No Types Assigned https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416 Release Notes, Third Party Advisory Added CWE NIST CWE-829 Added CPE Configuration OR *cpe:2.3:a:ckeditor:ckeditor:*:*:*:*:*:*:*:* versions from (including) 4.0 up to (excluding) 4.16
Vulnerability Scoring Details
Base CVSS Score: 6.5
Base CVSS Score: 4.3
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.64 }} -0.31%
score
0.68233
percentile