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CVE-2018-12895

HIGH 8.8 CVSS 3.1
Published
June 26, 2018
Last modified
June 17, 2026
NVD status
Modified
Reported by
cve@mitre.org
Weakness
CWE-22
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Affected WordPress components

  • WordPress core
    Confirmed match
    Before 4.9.7

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • n/a n/a — Versions not specified
  • wordpress wordpress — Before 4.9.7

References

  • packetstormsecurity.com http://packetstormsecurity.com/files/164633/WordPress-4.9.6-Arbitrary-File-Deletion.html Exploit, Third Party Advisory, VDB Entry
  • www.securityfocus.com http://www.securityfocus.com/bid/104569 Third Party Advisory, VDB Entry
  • blog.ripstech.com https://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/ Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2018/07/msg00046.html Mailing List, Third Party Advisory
  • wpvulndb.com https://wpvulndb.com/vulnerabilities/9100 Third Party Advisory
  • www.debian.org https://www.debian.org/security/2018/dsa-4250 Third Party Advisory
  • nvd.nist.gov Official NVD record