CVE-2018-20148
9.8
CRITICAL · CVSS 3.0 · EPSS 26.8% (pctl 98)
Patch early
EPSS 26.8% — above the 10% action threshold.
Description
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 26.82% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-502 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2018-12-14 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| debian | debian linux |
| wordpress | wordpress |
References
- http://www.securityfocus.com/bid/106220
- https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you-are
- https://codex.wordpress.org/Version_4.9.9
- https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html
- https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/
- https://wordpress.org/support/wordpress-version/version-5-0-1/
- https://wpvulndb.com/vulnerabilities/9171
- https://www.debian.org/security/2019/dsa-4401
- https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/
- https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-popular-websites-online/
- http://www.securityfocus.com/bid/106220
- https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you-are
- https://codex.wordpress.org/Version_4.9.9
- https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html
- https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/
- https://wordpress.org/support/wordpress-version/version-5-0-1/
- https://wpvulndb.com/vulnerabilities/9171
- https://www.debian.org/security/2019/dsa-4401
- https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/
- https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-popular-websites-online/
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