PT-2018-11457 · WordPress · Wordpress
Published
2018-06-26
·
Updated
2021-11-05
·
CVE-2018-12895
CVSS v3.1
8.8
High
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
WordPress versions prior to 4.9.7
Description
The issue allows Author users to execute arbitrary code by leveraging directory traversal in the "wp-admin/post.php" endpoint, specifically the
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 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.Recommendations
For WordPress versions prior to 4.9.7, update to version 4.9.7 or later to resolve the issue. As a temporary workaround, consider restricting access to the
wp-admin/post.php endpoint and the wp delete attachment function to minimize the risk of exploitation. Additionally, restrict the thumb parameter in the wp-admin/post.php endpoint to prevent directory traversal attacks.Exploit
Fix
Path traversal
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Wordpress