CVE-2020-9281 json
CKEditor 4.0 vulnerability in the HTML Data Processor
published 2020-03-07 6 y ago modified 2026-09-08 2 mo ago also BIT-drupal-2020-9281 , EUVD-2021-1200 , GHSA-vcjf-mgcg-jxjq
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.3%
- EPSS 4.3% chance of exploitation in 30 days, percentile 91%
- public exploits
- 0
- none known
Summary
A cross-site scripting (XSS) vulnerability in the HTML Data Processor for CKEditor 4.0 before 4.14 allows remote attackers to inject arbitrary web script through a crafted "protected" comment (with the cke_protected syntax).
Patch / fix
- npm ckeditor4 4.14.0
- bitnami drupal 8.7.12, 8.8.4
- ckeditor ckeditor 4.14
- drupal drupal 8.7.12, 8.8.4
- oracle application_express 20.2
- oracle jd_edwards_enterpriseone_tools 9.2.5.2
- oracle siebel_apps_-_customer_order_management 21.0
- ckeditor Ubuntu 18.04 LTS 4.5.7+dfsg-2ubuntu0.18.04.1
- ckeditor Ubuntu 20.04 LTS 4.12.1+dfsg-1ubuntu0.1
- ckeditor Ubuntu Pro 16.04 LTS 4.5.7+dfsg-2ubuntu0.16.04.1~esm1
ubuntu advisories UBUNTU-CVE-2020-9281
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2020-9281 updated cvss 6.1
ckeditor: XSS in the HTML Data Processor allows remote attackers to inject arbitrary web script through a crafted "protected" comment
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
4.31% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | ckeditor4 | <4.14.0 |
4.14.0 |
| bitnami | drupal | >=8.7.0, <8.7.12 >=8.8.0, <8.8.4 |
8.7.12 8.8.4 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
oracle.com
/security-alerts/cpuoct2020.html
web, patch, third-party-advisory, advisory
-
oracle.com
/security-alerts/cpujan2021.html
web, patch, third-party-advisory, advisory
-
oracle.com
/security-alerts/cpuApr2021.html
web, patch, third-party-advisory, advisory
-
oracle.com
/security-alerts/cpujan2022.html
web, patch, vendor-advisory, advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/7OJ4BSS3VEAEXPNSOOUAXX6RDNECGZNO/
vendor-advisory, web
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/M4HHYQ6N452XTCIROFMJOTYEUWSB6FR4/
vendor-advisory, web
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/L322YA73LCV3TO7ORY45WQDAFJVNKXBE/
vendor-advisory, web
-
github.com
/ckeditor/ckeditor4
package, product, third-party-advisory, advisory
-
oracle.com
/security-alerts/cpuoct2021.html
web, not-applicable, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-9281
advisory, web
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/7OJ4BSS3VEAEXPNSOOUAXX6RDNECGZNO
web
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/L322YA73LCV3TO7ORY45WQDAFJVNKXBE
web
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/M4HHYQ6N452XTCIROFMJOTYEUWSB6FR4
web
Sources
- CVE List CVE-2020-9281
- GitHub Advisory GHSA-vcjf-mgcg-jxjq
- NVD CVE-2020-9281
- OSV BIT-drupal-2020-9281
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.