CVE-2021-33829
Ubuntu Security Notice USN-5340-1
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Una vulnerabilidad de tipo cross-site scripting (XSS) en el Procesador de Datos HTML en CKEditor versiones 4 4.14.0 hasta 4.16.x versiones anteriores a 4.16.1, permite a atacantes remotos inyectar código JavaScript ejecutable mediante un comentario diseñado porque -!> No es manejado apropiadamente
Kyaw Min Thein discovered that CKEditor incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affects Ubuntu 18.04 LTS. Micha Bentkowski discovered that CKEditor incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affects Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-06-03 CVE Reserved
- 2021-06-09 CVE Published
- 2024-08-03 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html | Mailing List |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser | 2023-11-07 | |
| https://www.drupal.org/sa-core-2021-003 | 2023-11-07 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Ckeditor Search vendor "Ckeditor" | Ckeditor Search vendor "Ckeditor" for product "Ckeditor" | >= 4.14.0 < 4.16.1 Search vendor "Ckeditor" for product "Ckeditor" and version " >= 4.14.0 < 4.16.1" | - |
Affected
| ||||||
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 33 Search vendor "Fedoraproject" for product "Fedora" and version "33" | - |
Affected
| ||||||
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 34 Search vendor "Fedoraproject" for product "Fedora" and version "34" | - |
Affected
| ||||||
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 35 Search vendor "Fedoraproject" for product "Fedora" and version "35" | - |
Affected
| ||||||
| Drupal Search vendor "Drupal" | Drupal Search vendor "Drupal" for product "Drupal" | >= 8.9.0 < 8.9.16 Search vendor "Drupal" for product "Drupal" and version " >= 8.9.0 < 8.9.16" | - |
Affected
| ||||||
| Drupal Search vendor "Drupal" | Drupal Search vendor "Drupal" for product "Drupal" | >= 9.0.0 < 9.0.14 Search vendor "Drupal" for product "Drupal" and version " >= 9.0.0 < 9.0.14" | - |
Affected
| ||||||
| Drupal Search vendor "Drupal" | Drupal Search vendor "Drupal" for product "Drupal" | >= 9.1.0 < 9.1.9 Search vendor "Drupal" for product "Drupal" and version " >= 9.1.0 < 9.1.9" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
| ||||||