CVE-2018-12895
HIGH severity · CVSS 8.8 · Path traversal
8.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)90%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://www.securityfocus.com/bid/104569Advisory
- https://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00046.htmlAdvisory
- https://wpvulndb.com/vulnerabilities/9100Advisory
- https://www.debian.org/security/2018/dsa-4250Advisory
- http://www.securityfocus.com/bid/104569Advisory
- http://packetstormsecurity.com/files/164633/WordPress-4.9.6-Arbitrary-File-Deletion.htmlAdvisory
- http://packetstormsecurity.com/files/164633/WordPress-4.9.6-Arbitrary-File-Deletion.htmlAdvisory