CVE-2021-32808: ckeditor Cross-site Scripting
Vulnerability summary
CVE-2021-32808 is a high (CVSS 7.6) Cross-site Scripting vulnerability in ckeditor. EPSS estimates a 1.19% chance of exploitation in the next 30 days, higher than 67.5% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 12-08-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
ckeditor is an open source WYSIWYG HTML editor with rich content support. A vulnerability has been discovered in the clipboard Widget plugin if used alongside the undo feature. The vulnerability allows a user to abuse undo functionality using malformed widget HTML, which could result in executing JavaScript code. It affects all users using the CKEditor 4 plugins listed above at version >= 4.13.0. The problem has been recognized and patched. The fix will be available in version 4.16.2.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.6HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
- 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 · calculated7.6HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
- NVDNIST5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NDiffers
EPSS trend
Probability
1.19%
Chance of exploitation in the next 30 days
Percentile
68%
Versus all other CVEs
30-day change
0.00 pp
From 1.19% 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
Oracle11 products
- application_express< 21.1.4
- banking_party_management2.7.0
- commerce_guided_search11.3.2
- commerce_merchandising11.3.2
- documaker12.6.3 | 12.6.4
Debian1 product
- ckeditor< 4.16.2+dfsg-1
Fedoraproject1 product
- fedoraEOL33 | 34 | 35
Npm1 product
- ckeditor4≥ 4.13.0, < 4.16.2
Ubuntu1 product
- ckeditor< 4.16.2+dfsg-1
6 vendors · 17 products
References
16 links- github.com/ckeditor/ckeditor4/security/advisories/GHSA-6226-h7ff-ch6cX Refsource CONFIRMREPORTWEBThird Party Advisory
- github.com/ckeditor/ckeditor4/releases/tag/4.16.2X Refsource MISCREPORTWEBRelease NotesThird Party Advisory
