WordPress Core < 4.9.7 - Authenticated Arbitrary File Deletion

Wordfence Intelligence   >   Vulnerability Database   >   WordPress Core < 4.9.7 - Authenticated Arbitrary File Deletion
8.8
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVE CVE-2018-12895
CVSS 8.8 (High)
Publicly Published July 5, 2018
Last Updated January 22, 2024
Researchers Matt Barry - Wordfence
Karim El Ouerghemmi
Slavco Mihajloski

Description

WordPress through 4.9.6 allows Author users to execute arbitrary code by leveraging directory traversal in the wp-admin/post.php thumb parameter, which is passed to the PHP unlink function and can delete the wp-config.php file. This is related to missing filename validation in the wp-includes/post.php wp_delete_attachment function. The attacker must have capabilities for files and posts that are normally available only to the Author, Editor, and Administrator roles. The attack methodology is to delete wp-config.php and then launch a new installation process to increase the attacker's privileges.

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: 3.7.27, 3.8.27, 3.9.25, 4.0.24, 4.1.24, 4.2.21, 4.3.17, 4.4.16, 4.5.15, 4.6.12, 4.7.11, 4.8.7, 4.9.7
Affected Versions
  • < 3.7
  • 4.8 - 4.8.6
  • 4.9 - 4.9.6
  • 3.7 - 3.7.26
Expand to see 10 more affected version ranges.
  • 3.8 - 3.8.26
  • 3.9 - 3.9.24
  • 4.0 - 4.0.23
  • 4.1 - 4.1.23
  • 4.2 - 4.2.20
  • 4.3 - 4.3.16
  • 4.4 - 4.4.15
  • 4.5 - 4.5.14
  • 4.6 - 4.6.11
  • 4.7 - 4.7.10
Patched Versions
  • 3.7.27
  • 3.8.27
  • 3.9.25
  • 4.0.24
Expand to see 9 more patched versions.
  • 4.1.24
  • 4.2.21
  • 4.3.17
  • 4.4.16
  • 4.5.15
  • 4.6.12
  • 4.7.11
  • 4.8.7
  • 4.9.7

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