CVE-2021-41165: ckeditor Cross-site Scripting
Vulnerability summary
CVE-2021-41165 is a high (CVSS 8.2) Cross-site Scripting vulnerability in ckeditor. EPSS estimates a 1.57% chance of exploitation in the next 30 days, higher than 75% of scored vulnerabilities.
Timeline
- 17-11-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
CKEditor4 is an open source WYSIWYG HTML editor. In affected version a vulnerability has been discovered in the core HTML processing module and may affect all plugins used by CKEditor 4. The vulnerability allowed to inject malformed comments HTML bypassing content sanitization, which could result in executing JavaScript code. It affects all users using the CKEditor 4 at version < 4.17.0. The problem has been recognized and patched. The fix will be available in version 4.17.0.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NDiffers
- OSV · DebianEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NDiffers
- OSV · NpmEcosystem advisory · calculated8.2HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L
- NVDNIST5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NDiffers
EPSS trend
Probability
1.57%
Chance of exploitation in the next 30 days
Percentile
75%
Versus all other CVEs
30-day change
0.00 pp
From 1.57% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Oracle7 products
- agile_product_lifecycle_management9.3.6
- application_express< 22.1
- banking_apis≥ 18.1, ≤ 18.3 | 19.1 | 19.2 | 20.1 | 21.1
- banking_digital_experience≥ 18.1, ≤ 18.3 | 19.1 | 19.2 | 20.1 | 21.1
- commerce_guided_search11.3.2
Ubuntu4 products
- ckeditorAll versions (No fix recorded)
- ckeditor3All versions (No fix recorded)
- ldap-account-managerAll versions (No fix recorded)
- request-tracker4All versions (No fix recorded)
Debian2 products
- ckeditor< 4.19.0+dfsg-1
- ckeditor3All versions (No fix recorded)
Drupal1 product
- drupal≥ 8.9.0, < 8.9.20 | ≥ 9.1.0, < 9.1.14 | ≥ 9.2.0, < 9.2.9
Npm1 product
- ckeditor4< 4.17.0
6 vendors · 18 products
References
11 links- github.com/ckeditor/ckeditor4/security/advisories/GHSA-7h26-63m7-qhf2X Refsource CONFIRMREPORTWEBThird Party Advisory
