CVE-2018-12895
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 62.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 62.16% probability · 99th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Affected
- wordpress/wordpress · debian/debian linux
- Source
- cve@mitre.org
References
- http://packetstormsecurity.com/files/164633/WordPress-4.9.6-Arbitrary-File-Deletion.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/104569Third Party Advisory, VDB Entry
- https://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00046.htmlMailing List, Third Party Advisory
- https://wpvulndb.com/vulnerabilities/9100Third Party Advisory
- https://www.debian.org/security/2018/dsa-4250Third Party Advisory
- http://packetstormsecurity.com/files/164633/WordPress-4.9.6-Arbitrary-File-Deletion.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/104569Third Party Advisory, VDB Entry
- https://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00046.htmlMailing List, Third Party Advisory
- https://wpvulndb.com/vulnerabilities/9100Third Party Advisory
- https://www.debian.org/security/2018/dsa-4250Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.