CVE-2018-20148

CRITICAL severity · CVSS 9.8 · Insecure deserialization

9.8CVSS CRITICAL

Summary

In WordPress before 4.9.9 and 5.x before 5.0.1, contributors could conduct PHP object injection attacks via crafted metadata in a wp.getMediaItem XMLRPC call. This is caused by mishandling of serialized data at phar:// URLs in the wp_get_attachment_thumb_file function in wp-includes/post.php.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)55%

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

WordPress

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Additional information

NVD record
https://codex.wordpress.org/Version_4.9.9Advisory
https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/Advisory
https://wordpress.org/support/wordpress-version/version-5-0-1/Advisory
https://wpvulndb.com/vulnerabilities/9171Advisory
http://www.securityfocus.com/bid/106220Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00019.htmlAdvisory
https://www.debian.org/security/2019/dsa-4401Advisory
https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you-areAdvisory