CVE-2018-20148

high-risk

Published 2018-12-14

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.

Do I need to act?

54.9% chance of exploitation in next 30 days

EPSS score — higher than 45% of all CVEs

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (3)

Wordpress

Debian Linux

Affected Vendors

Debian Wordpress

References (20)

Third Party Advisory http://www.securityfocus.com/bid/106220

Exploit https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you...

Product https://codex.wordpress.org/Version_4.9.9

Mailing List https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html

Release Notes https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/

Release Notes https://wordpress.org/support/wordpress-version/version-5-0-1/

Vendor Advisory https://wpvulndb.com/vulnerabilities/9171

Third Party Advisory https://www.debian.org/security/2019/dsa-4401

Press/Media Coverage https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-so...

Press/Media Coverage https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-po...