CVE-2021-33829
high
CVSS v3
—
CVSS v4 NEW
—
VIR risk
8.0
Description
ckeditor4 vulnerable to cross-site scripting
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 9.1.10-1 |
Debian Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| bullseye | Fixed | 4.16.0+dfsg-2 |
| bookworm | Fixed | 4.16.0+dfsg-2 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | ckeditor | !< 5.1.1||<>= 5.1.2 | >= 5.1.2 |
| Packagist | drupal/core | >=8.0.0,<8.9.16||>=9.0.0,<9.0.14||>=9.1.0,<9.1.9 | 8.9.16 |
| npm | ckeditor4 | >=4.14.0,<4.16.1 | 4.16.1 |
| Packagist | drupal/core | >=7.0.0,<7.80 | 7.80 |
| Packagist | drupal/core | >=8.0.0,<8.9.16 | 8.9.16 |
| Packagist | drupal/core | >=9.0.0,<9.0.14 | 9.0.14 |
| Packagist | drupal/core | >=9.1.0,<9.1.9 | 9.1.9 |
| Packagist | drupal/drupal | >=7.0.0,<7.80 | 7.80 |
| Packagist | drupal/drupal | >=8.0.0,<8.9.16 | 8.9.16 |
| Packagist | drupal/drupal | >=9.0.0,<9.0.14 | 9.0.14 |
| Packagist | drupal/drupal | >=9.1.0,<9.1.9 | 9.1.9 |
References
- https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser
- https://security.archlinux.org/ASA-202106-35
- https://security-tracker.debian.org/tracker/CVE-2021-33829
- https://nvd.nist.gov/vuln/detail/CVE-2021-33829
- 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/ckeditor/ckeditor4
- 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://www.drupal.org/sa-core-2021-003
- https://www.npmjs.com/package/ckeditor4
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.