CVE-2018-20148 : In WordPress before 4.9.9 and 5.x before 5.0.1, contributors could conduct PHP object injection attacks via crafted meta

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.

Published 2018-12-14 20:29:00

Updated 2019-03-04 14:19:39

Source MITRE

View at NVD, CVE.org

Threat overview for CVE-2018-20148

Top countries where our scanners detected CVE-2018-20148

Top open port discovered on systems with this issue 80

IPs affected by CVE-2018-20148 48

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2018-20148!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2018-20148

Probability of exploitation activity in the next 30 days: 1.58%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 86 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2018-20148

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2018-20148

CWE-502 Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2018-20148

http://www.securityfocus.com/bid/106220

WordPress Prior to 5.0.1 Multiple Security Vulnerabilities
Third Party Advisory;VDB Entry

CVEs referencing this url
https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you-are

Near, phar, dangerous Unserialization wherever you are
Exploit;Third Party Advisory
https://wordpress.org/support/wordpress-version/version-5-0-1/

Version 5.0.1 | WordPress.org
Release Notes;Vendor Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html

[SECURITY] [DLA 1673-1] wordpress security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/

News – WordPress 5.0.1 Security Release – WordPress.org
Release Notes;Vendor Advisory

CVEs referencing this url
https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-popular-websites-online/

Severe vulnerability exposes WordPress websites to attack | ZDNet
Press/Media Coverage;Third Party Advisory
https://wpvulndb.com/vulnerabilities/9171

WordPress <= 5.0 - PHP Object Injection via Meta Data
Vendor Advisory
https://www.debian.org/security/2019/dsa-4401

Debian -- Security Information -- DSA-4401-1 wordpress
Third Party Advisory

CVEs referencing this url
https://codex.wordpress.org/Version_4.9.9

Version 4.9.9 | WordPress.org
Product;Vendor Advisory

CVEs referencing this url
https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/

WordPress plugs bug that led to Google indexing some user passwords | ZDNet
Press/Media Coverage;Third Party Advisory

CVEs referencing this url

Products affected by CVE-2018-20148