WordPress Core < 5.1.1 - Cross-Site Request Forgery to Cross-Site Scripting via Comments

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9.6
Cross-Site Request Forgery (CSRF)
CVE CVE-2019-9787
CVSS 9.6 (Critical)
Publicly Published April 12, 2019
Last Updated August 14, 2023
Researcher Simon Scannell

Description

WordPress before 5.1.1 does not properly filter comment content, leading to Remote Code Execution by unauthenticated users in a default configuration. This occurs because CSRF protection is mishandled, and because Search Engine Optimization of A elements is performed incorrectly, leading to XSS. The XSS results in administrative access, which allows arbitrary changes to .php files. This is related to wp-admin/includes/ajax-actions.php and wp-includes/comment.php.

References

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1 affected software package

WordPress

Software Type Core
Patched? Yes
Remediation Update to one of the following versions, or a newer patched version: 3.7.29, 3.8.29, 3.9.27, 4.0.26, 4.1.26, 4.2.23, 4.3.19, 4.4.18, 4.5.17, 4.6.14, 4.7.13, 4.8.9, 4.9.10, 5.0.4, 5.1.1
Affected Versions
  • 5.1
  • < 3.7
  • 4.8 - 4.8.8
  • 4.9 - 4.9.9
Expand to see 12 more affected version ranges.
  • 5.0 - 5.0.3
  • 3.7 - 3.7.28
  • 3.8 - 3.8.28
  • 3.9 - 3.9.26
  • 4.0 - 4.0.25
  • 4.1 - 4.1.25
  • 4.2 - 4.2.22
  • 4.3 - 4.3.18
  • 4.4 - 4.4.17
  • 4.5 - 4.5.16
  • 4.6 - 4.6.13
  • 4.7 - 4.7.12
Patched Versions
  • 3.7.29
  • 3.8.29
  • 3.9.27
  • 4.0.26
Expand to see 11 more patched versions.
  • 4.1.26
  • 4.2.23
  • 4.3.19
  • 4.4.18
  • 4.5.17
  • 4.6.14
  • 4.7.13
  • 4.8.9
  • 4.9.10
  • 5.0.4
  • 5.1.1

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