CVE-2021-33829: XSS
First published: Tue May 25 2021(Updated: )
A cross-site scripting (XSS) vulnerability in the HTML Data Processor in CKEditor 4 4.14.0 through 4.16.x before 4.16.1 allows remote attackers to inject executable JavaScript code through a crafted comment because --!> is mishandled.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/drupal/drupal | >=7.0.0<7.80>=8.0.0<8.1.0>=8.1.0<8.2.0>=8.2.0<8.3.0>=8.3.0<8.4.0>=8.4.0<8.5.0>=8.5.0<8.6.0>=8.6.0<8.7.0>=8.7.0<8.8.0>=8.8.0<8.9.0>=8.9.0<8.9.16>=9.0.0<9.0.14>=9.1.0<9.1.9 | |
| composer/drupal/core | >=7.0.0<7.80>=8.0.0<8.1.0>=8.1.0<8.2.0>=8.2.0<8.3.0>=8.3.0<8.4.0>=8.4.0<8.5.0>=8.5.0<8.6.0>=8.6.0<8.7.0>=8.7.0<8.8.0>=8.8.0<8.9.0>=8.9.0<8.9.16>=9.0.0<9.0.14>=9.1.0<9.1.9 | |
| Ckeditor Ckeditor | >=4.14.0<4.16.1 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Fedoraproject Fedora | =35 | |
| Drupal Drupal | >=8.9.0<8.9.16 | |
| Drupal Drupal | >=9.0.0<9.0.14 | |
| Drupal Drupal | >=9.1.0<9.1.9 | |
| Debian Debian Linux | =9.0 | |
| composer/drupal/drupal | >=9.1.0<9.1.9 | 9.1.9 |
| composer/drupal/drupal | >=9.0.0<9.0.14 | 9.0.14 |
| composer/drupal/drupal | >=8.0.0<8.9.16 | 8.9.16 |
| composer/drupal/drupal | >=7.0.0<7.80 | 7.80 |
| composer/drupal/core | >=9.1.0<9.1.9 | 9.1.9 |
| composer/drupal/core | >=9.0.0<9.0.14 | 9.0.14 |
| composer/drupal/core | >=8.0.0<8.9.16 | 8.9.16 |
| composer/drupal/core | >=7.0.0<7.80 | 7.80 |
| npm/ckeditor4 | >=4.14.0<4.16.1 | 4.16.1 |
| IBM IBM® Engineering Requirements Management DOORS | <=9.7.2.7 | |
| IBM IBM® Engineering Requirements Management DOORS Web Access | <=9.7.2.7 |
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Reference Links
- https://www.drupal.org/sa-core-2021-003
- https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser
- https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/
- https://nvd.nist.gov/vuln/detail/CVE-2021-33829
- https://www.npmjs.com/package/ckeditor4
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2021-33829.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2021-33829.yaml
- https://github.com/advisories/GHSA-rgx6-rjj4-c388 (Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/203802
- https://www.ibm.com/support/pages/node/7124058
Frequently Asked Questions
What is CVE-2021-33829?
CVE-2021-33829 is a vulnerability in Drupal core that allows for cross-site scripting (XSS) attacks.
How severe is CVE-2021-33829?
CVE-2021-33829 has a severity rating of 7.2, which is considered high.
How does CVE-2021-33829 affect Drupal websites?
CVE-2021-33829 can allow remote attackers to inject malicious scripts into a Drupal website, which can be executed by visitors to the site, compromising their browsing security.
What versions of Drupal are affected by CVE-2021-33829?
Versions 7.x, 8.x, and 9.x of Drupal are affected by CVE-2021-33829.
Where can I find more information about CVE-2021-33829 and its remediation?
For more information about CVE-2021-33829 and its remediation, you can visit the Drupal Security Advisory SA-CORE-2021-003 or the IBM X-Force Exchange website.
- collector/friends-of-php
- collector/nvd-index
- agent/author
- agent/type
- agent/remedy
- agent/first-publish-date
- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-rgx6-rjj4-c388
- alias/CVE-2021-33829
- agent/software-canonical-lookup
- agent/weakness
- agent/severity
- agent/description
- collector/nvd-cve
- source/NVD
- collector/github-advisory
- agent/references
- agent/softwarecombine
- collector/ibm-support
- source/IBM
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/tags
- agent/event
- agent/trending
- package-manager/composer
- vendor/ckeditor
- canonical/ckeditor ckeditor
- version/ckeditor ckeditor/4.14.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- version/fedoraproject fedora/34
- version/fedoraproject fedora/35
- vendor/drupal
- canonical/drupal drupal
- version/drupal drupal/8.9.0
- version/drupal drupal/9.0.0
- version/drupal drupal/9.1.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- package-manager/npm