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Drupal core - SA-CORE-2021-003

  • Disclosed: 26.05.2021
  • Updated: 11.10.2026 13:17

Update: 2021-06-11: Added CVE-2021-33829 identifier

Drupal core uses the third-party CKEditor library. This library has an error in parsing HTML that could lead to an XSS attack. CKEditor 4.16.1 and later include the fix.

Update: 2021-06-11: More details are available on CKEditor's blog.

Users of the CKEditor library via means other than Drupal core should update their 3rd party code (e.g. the WYSIWYG module for Drupal 7). The Drupal Security Team policy is not to alert for issues affecting 3rd party libraries unless those are shipped with Drupal core. See DRUPAL-SA-PSA-2016-004 for more details.

This issue is mitigated by the fact that it only affects sites with CKEditor enabled.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package drupal/core >= 8.0.0, < 8.9.16, >= 9.0.0, < 9.0.14, >= 9.1.0, < 9.1.9 8.9.16, 9.0.14, 9.1.9
Composer package drupal/drupal >= 7.0.0, < 7.80, >= 8.0.0, < 8.9.16, >= 9.0.0, < 9.0.14, >= 9.1.0, < 9.1.9 7.80, 8.9.16, 9.0.14, 9.1.9
Drupal (core) drupal/core >= 8.0.0, < 8.9.16, >= 9.0.0, < 9.0.14, >= 9.1.0, < 9.1.9 8.9.16, 9.0.14, 9.1.9
npm package ckeditor4 >= 4.14.0, < 4.16.1 4.16.1

References

CVSS score 6.1/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-79
Platform
Composer, Drupal, npm
Package
drupal/core, drupal/drupal, ckeditor4
Disclosed
26.05.2021
Updated
11.10.2026 13:17

Sources and licenses

OSV / GitHub Advisory Database - GHSA-rgx6-rjj4-c388 - CC BY 4.0

OSV / GitHub Advisory Database - DRUPAL-CORE-2021-003 - CC BY-SA 2.0; code GPL-2.0-or-later

Vulnerability history: drupal/core

All published vulnerabilities of this package (Drupal (core)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (165) in the archive
Total entries
165
First → latest
02.2018 09.2026
Without a fix
3
Exploited in attacks
5

Severity breakdown

  • Critical 17
  • High 44
  • Medium 72
  • Low 6
  • Unrated 26

Disclosures per year

Severity:
  1. Drupal Core has a SQL Injection issue
    Critical · 9.8 Exploited in attacks CVE-2026-9082 >= 8.9.0, < 10.4.10, >= 10.5.0, < 10.5.10, >= 10.6.0, < 10.6.9, >= 11.0.0, < 11.1.10, >= 11.2.0, < 11.2.12, >= 11.3.0, < 11.3.10 10.4.10, 10.5.10, 10.6.9, 11.1.10, 11.2.12, 11.3.10
  2. Drupal core contains a potential PHP Object Injection vulnerability
    High · 9.8 CVE-2024-55638 >= 8.8.0, < 10.2.11, >= 10.3.0, < 10.3.9, >= 7.0, < 7.102, >= 8.8.0, < 10.2.11, >= 10.3.0, < 10.3.9, >= 7.0, < 7.102, >= 8.8.0, < 10.2.11, >= 10.3.0, < 10.3.9, >= 7.0, < 7.102 10.2.11, 10.3.9, 7.102
  3. Drupal core contains a potential PHP Object Injection vulnerability
    High · 9.8 CVE-2024-55637 >= 8.8.0, < 10.2.11, >= 10.3.0, < 10.3.9, >= 11.0.0, < 11.0.8, >= 8.8.0, < 10.2.11, >= 10.3.0, < 10.3.9, >= 11.0.0, < 11.0.8, >= 8.8.0, < 10.2.11, >= 10.3.0, < 10.3.9, >= 11.0.0, < 11.0.8 10.2.11, 10.3.9, 11.0.8
  4. Drupal core Arbitrary PHP code execution
    High · 7.8 ghsa-j66p-fvp2-fxhj >= 7.0.0, < 7.75, >= 8.0.0, < 8.8.12, >= 8.9.0, < 8.9.10, >= 9.0.0, < 9.0.9 7.75, 8.8.12, 8.9.10, 9.0.9
  5. Drupal core Multiple vulnerabilities due to the use of the third-party library Archive_Tar
    High · 8.1 ghsa-m9fv-whq2-6wmc >= 7.0.0, < 7.69, >= 8.0.0, < 8.7.11, >= 8.8.0, < 8.8.1 7.69, 8.7.11, 8.8.1
  6. Drupal core Remote Code Execution
    Critical ghsa-jf8c-36vw-98x4 >= 7.0, < 7.60, >= 8.0.0, < 8.5.8, >= 8.6.0, < 8.6.2 7.60, 8.5.8, 8.6.2
  7. Drupal Core Insufficient Contextual Links validation leads to Remote Code Execution
    Critical ghsa-jjx7-8462-w4m4 >= 8.0.0, < 8.5.8, >= 8.6.0, < 8.6.2 8.5.8, 8.6.2
  8. Drupal core Arbitrary PHP code execution
    High · 7.8 ghsa-gxxj-g9v8-w28p >= 7.0.0, < 7.75, >= 8.0.0, < 8.8.12, >= 8.9.0, < 8.9.10, >= 9.0.0, < 9.0.9 7.75, 8.8.12, 8.9.10, 9.0.9
  9. Drupal core Multiple vulnerabilities due to the use of the third-party library Archive_Tar
    High · 8.1 ghsa-98h9-727m-44qv >= 7.0.0, < 7.69, >= 8.0.0, < 8.7.11, >= 8.8.0, < 8.8.1 7.69, 8.7.11, 8.8.1
  10. Drupal Core Insufficient Contextual Links validation leads to Remote Code Execution
    Critical ghsa-7v68-3pr5-h3cr >= 8.0.0, < 8.5.8, >= 8.6.0, < 8.6.2 8.5.8, 8.6.2
  11. Drupal core Remote Code Execution
    Critical ghsa-6mgp-v5cm-ghg5 >= 7.0, < 7.60, >= 8.0.0, < 8.5.8, >= 8.6.0, < 8.6.2 7.60, 8.5.8, 8.6.2
  12. Drupal core - SA-CORE-2024-001
    High · 7.5 CVE-2024-11941 >= 8.0.0, < 10.1.8, >= 10.2.0, < 10.2.2 10.1.8, 10.2.2
  13. Drupal core - SA-CORE-2023-006
    Critical CVE-2023-5256 >= 8.7.0, < 9.5.11, >= 10.0.0, < 10.0.11, >= 10.1.0, < 10.1.4 9.5.11, 10.0.11, 10.1.4
  14. Drupal core - SA-CORE-2023-005
    Critical CVE-2023-31250 >= 8.0.0, < 9.4.14, >= 9.5.0, < 9.5.8, >= 10.0.0, < 10.0.8 9.4.14, 9.5.8, 10.0.8
  15. Drupal core - SA-CORE-2022-016
    High · 7.5 CVE-2022-39261 >= 8.0.0, < 9.3.22, >= 9.4.0, < 9.4.7 9.3.22, 9.4.7
  16. Drupal core - SA-CORE-2022-014
    High · 7.2 CVE-2022-25277 >= 8.0.0, < 9.3.19, >= 9.4.0, < 9.4.3 9.3.19, 9.4.3
  17. Drupal core - SA-CORE-2022-012
    High · 7.5 CVE-2022-25275 >= 8.0.0, < 9.3.19, >= 9.4.0, < 9.4.3 9.3.19, 9.4.3
  18. Drupal core - SA-CORE-2022-011
    High · 7.5 CVE-2022-31042 >= 8.0.0, < 9.2.21, >= 9.3.0, < 9.3.16 9.2.21, 9.3.16
  19. Drupal core - SA-CORE-2022-010
    High · 8.0 CVE-2022-29248 >= 8.0.0, < 9.2.20, >= 9.3.0, < 9.3.14 9.2.20, 9.3.14
  20. Drupal has open redirect vulnerability in the Overlay module
    High · 7.5 CVE-2013-6389 >= 7.0, < 7.24 7.24
  21. Drupal Access Control Bypass
    High CVE-2011-2687 >= 7.0, < 7.3 7.3
  22. Drupal Open Redirect
    High · 7.4 CVE-2016-3164 >= 6.0, < 6.38, >= 7.0, < 7.43, >= 8.0, < 8.0.4, >= 8.0, < 8.0.4, >= 7.0, < 7.43, >= 6.0, < 6.38 6.38, 7.43, 8.0.4
  23. Drupal Form API ignores access restrictions on submit buttons
    High · 7.5 CVE-2016-3165 >= 6.0, < 6.38, >= 6.0, < 6.38 6.38
  24. Drupal saving user accounts can sometimes grant the user all roles
    High · 8.1 CVE-2016-3169 >= 6.0, < 6.38, >= 7.0, < 7.43, >= 7.0, < 7.43, >= 6.0, < 6.38 6.38, 7.43
  25. Drupal Brute force amplification attacks via XML-RPC
    High · 7.5 CVE-2016-3163 >= 7.0, < 7.43, >= 6.0, < 6.38, >= 7.0, < 7.43, >= 6.0, < 6.38 7.43, 6.38
  26. Drupal Open redirect vulnerability in the drupal_goto function
    High · 7.4 CVE-2016-3167 >= 6.0, < 6.38, >= 6.0, < 6.38 6.38
  27. Drupal File upload access bypass and denial of service
    High · 8.1 CVE-2016-3162 >= 7.0, < 7.43, >= 8.0, < 8.0.4, >= 8.0, < 8.0.4, >= 7.0, < 7.43 7.43, 8.0.4
  28. Drupal arbitrary code execution
    High · 8.1 CVE-2016-3171 >= 6.0, < 6.38, >= 6.0, < 6.38 6.38
  29. Drupal Saving user accounts can sometimes grant the user all roles
    High · 8.8 CVE-2016-6211 >= 7.0, < 7.44, >= 7.0, < 7.44 7.44
  30. Drupal Incorrect cache context on password reset page
    High · 7.5 CVE-2016-9450 >= 8.0, < 8.2.3, >= 8.0, < 8.2.3 8.2.3
  31. Drupal Cross-Site Request Forgery (CSRF)
    High · 7.5 CVE-2017-6379 >= 8.2.0, < 8.2.7, >= 8.2.0, < 8.2.7 8.2.7
  32. Drupal Node Validation Bypass in the node module API
    High CVE-2008-4793 >= 5.0, < 5.11 5.11
  33. Drupal Comment reply form allows access to restricted content
    High · 8.1 CVE-2017-6926 >= 8.4.0, < 8.4.5, >= 7.0, < 7.57, >= 8.4.0, < 8.4.5, >= 7.0, < 7.57 8.4.5, 7.57
  34. Drupal PECL YAML parser unsafe object handling
    Critical · 9.8 CVE-2017-6920 >= 8.0, < 8.3.4, >= 8.0, < 8.3.4 8.3.4
  35. Drupal access control bypass vulnerability
    High · 7.5 CVE-2017-6919 >= 8.0, < 8.2.8, >= 8.3.0, < 8.3.1, >= 8.0, < 8.2.8, >= 8.3.0, < 8.3.1 8.2.8, 8.3.1
  36. Drupal access bypass vulnerability
    High · 8.1 CVE-2017-6930 >= 8.4.0, < 8.4.5, >= 8.4.0, < 8.4.5 8.4.5
  37. Drupal Entity access bypass for entities that do not have UUIDs or have protected revisions
    Critical · 9.8 CVE-2017-6925 >= 8.0, < 8.3.7, >= 8.0, < 8.3.7 8.3.7
  38. Drupal Remote code execution
    High · 8.1 CVE-2017-6381 >= 8.0, < 8.2.7, >= 8.0, < 8.2.7 8.2.7
  39. Drupal editor module incorrectly checks access to inline private files
    High · 7.5 CVE-2017-6377 >= 8.2.0, < 8.2.7, >= 8.2.0, < 8.2.7 8.2.7
  40. Drupal REST API can bypass comment approval
    High · 7.4 CVE-2017-6924 >= 8.0, < 8.3.7, >= 8.0, < 8.3.7 8.3.7
  41. Drupal SQL Injection vulnerability
    Critical · 9.8 CVE-2011-2715 = 6.20 no fix
  42. Drupal core - SA-CORE-2022-008
    High · 7.5 CVE-2022-25273 >= 8.0.0, < 9.2.18, >= 9.3.0, < 9.3.12 9.2.18, 9.3.12
  43. HTTP Proxy header vulnerability
    High · 8.1 CVE-2016-5385 >= 8.0, < 8.1.7 8.1.7
  44. guzzlehttp/psr7 <= 1.84 and 2.0.0-2.1.0 - Improper Input Validation
    High · 7.5 CVE-2022-24775 >= 8.0.0, < 9.2.16, >= 9.3.0, < 9.3.9 9.2.16, 9.3.9
  45. Drupal core - SA-CORE-2022-003
    High · 7.5 CVE-2022-25271 >= 8.0.0, < 9.2.13, >= 9.3.0, < 9.3.6 9.2.13, 9.3.6
  46. Drupal core - SA-CORE-2021-010
    High · 7.5 CVE-2020-13677 >= 8.0.0, < 8.9.19, >= 9.1.0, < 9.1.13, >= 9.2.0, < 9.2.6 8.9.19, 9.1.13, 9.2.6
  47. Drupal core - SA-CORE-2021-008
    Critical · 9.8 CVE-2020-13675 >= 8.0.0, < 8.9.19, >= 9.1.0, < 9.1.13, >= 9.2.0, < 9.2.6 8.9.19, 9.1.13, 9.2.6
  48. Drupal core - SA-CORE-2021-004
    High · 7.1 CVE-2021-32610 >= 8.0.0, < 8.9.17, >= 9.1.0, < 9.1.11, >= 9.2.0, < 9.2.2 8.9.17, 9.1.11, 9.2.2
  49. Drupal core - SA-CORE-2021-003 this entry
    Medium · 6.1 CVE-2021-33829 >= 8.0.0, < 8.9.16, >= 9.0.0, < 9.0.14, >= 9.1.0, < 9.1.9 8.9.16, 9.0.14, 9.1.9
  50. Drupal core - SA-CORE-2020-013
    High · 7.8 CVE-2020-28948 >= 8.0.0, < 8.8.12, >= 8.9.0, < 8.9.10, >= 9.0.0, < 9.0.9 8.8.12, 8.9.10, 9.0.9
  51. Drupal core - SA-CORE-2020-012
    High · 8.8 Exploited in attacks CVE-2020-13671 >= 8.0.0, < 8.8.11, >= 8.9.0, < 8.9.9, >= 9.0.0, < 9.0.8 8.8.11, 8.9.9, 9.0.8
  52. Drupal core - SA-CORE-2020-011
    High · 7.5 CVE-2020-13670 >= 8.0.0, < 8.8.10, >= 8.9.0, < 8.9.6, >= 9.0.0, < 9.0.6 8.8.10, 8.9.6, 9.0.6
  53. Drupal core - SA-CORE-2020-006
    Critical · 9.8 CVE-2020-13665 >= 8.0.0, < 8.8.8, >= 8.9.0, < 8.9.1, >= 9.0.0, < 9.0.1 8.8.8, 8.9.1, 9.0.1
  54. Drupal core - SA-CORE-2020-005
    High · 8.8 CVE-2020-13664 >= 8.0.0, < 8.8.8, >= 8.9.0, < 8.9.1, >= 9.0.0, < 9.0.1 8.8.8, 8.9.1, 9.0.1
  55. Drupal core - SA-CORE-2020-004
    High · 8.8 CVE-2020-13663 >= 8.0.0, < 8.8.8, >= 8.9.0, < 8.9.1, >= 9.0.0, < 9.0.1 8.8.8, 8.9.1, 9.0.1
  56. Drupal core - SA-CORE-2019-008
    Critical · 9.8 CVE-2019-6342 >= 8.7.4, < 8.7.5 8.7.5
  57. Drupal core - SA-CORE-2019-007
    Critical · 9.8 CVE-2019-11831 >= 8.0.0, < 8.6.16, >= 8.7.0, < 8.7.1 8.6.16, 8.7.1
  58. Drupal core - SA-CORE-2019-003
    High · 8.1 Exploited in attacks CVE-2019-6340 >= 8.0.0, < 8.5.11, >= 8.6.0, < 8.6.10 8.5.11, 8.6.10
  59. Drupal core - SA-CORE-2019-002
    Critical · 9.8 CVE-2019-6339 >= 8.0.0, < 8.5.9, >= 8.6.0, < 8.6.6 8.5.9, 8.6.6
  60. Drupal core - SA-CORE-2019-001
    High · 8.0 CVE-2019-6338 >= 8.0.0, < 8.5.9, >= 8.6.0, < 8.6.6 8.5.9, 8.6.6
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