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Vulnerability details: VCID-5u2z-e2s3-87bt
Vulnerability ID VCID-5u2z-e2s3-87bt
Aliases CVE-2018-20148
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.
Status Published
Exploitability 0.5
Weighted Severity 8.8
Risk 4.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-502 Deserialization of Untrusted Data
System Score Found at
epss 0.46043 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.46043 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.46043 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.46043 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.46043 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.46043 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.46043 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.46043 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.46043 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.46043 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.54597 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
epss 0.54597 https://api.first.org/data/v1/epss?cve=CVE-2018-20148
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-20148
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2018-20148
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-20148
https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you-are
https://codex.wordpress.org/Version_4.9.9
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20147
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20148
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20149
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20150
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20151
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20152
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20153
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8942
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
916403 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916403
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
CVE-2018-20148 https://nvd.nist.gov/vuln/detail/CVE-2018-20148
No exploits are available.
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-20148
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-20148
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.97528
EPSS Score 0.46043
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T09:59:31.774908+00:00 NVD Importer Import https://nvd.nist.gov/vuln/detail/CVE-2018-20148 37.0.0