WordPress up to 5.0.0 Metadata deserialization

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability was found in WordPress up to 5.0.0. It has been classified as critical. This affects an unknown function of the component Metadata Handler. This manipulation causes deserialization. This vulnerability appears as CVE-2018-20148. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in WordPress up to 5.0.0 (Content Management System) and classified as critical. Affected by this vulnerability is an unknown code block of the component Metadata Handler. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In WordPress versions before 5.0.1, contributors could conduct PHP object injection attacks via crafted metadata.

The bug was discovered 12/13/2018. The weakness was presented 12/14/2018 by Sam Thomas (Website). The advisory is shared at securityfocus.com. This vulnerability is known as CVE-2018-20148 since 12/14/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 119615 (WordPress < 4.9.9 / 5.x < 5.0.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176626 (Debian Security Update for wordpress (DSA 4401-1)).

Upgrading to version 3.7.28, 3.8.28, 3.9.26, 4.0.25, 4.1.25, 4.2.22, 4.3.18, 4.4.17, 4.5.16, 4.6.13, 4.7.12, 4.8.8, 4.9.9 or 5.0.1 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (119615) and SecurityFocus (BID 106220†). See VDB-127992, VDB-127994, VDB-127995 and VDB-127996 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 119615
Nessus Name: WordPress < 4.9.9 / 5.x < 5.0.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: WordPress 3.7.28/3.8.28/3.9.26/4.0.25/4.1.25/4.2.22/4.3.18/4.4.17/4.5.16/4.6.13/4.7.12/4.8.8/4.9.9/5.0.1

Timelineinfo

12/13/2018 🔍
12/13/2018 +0 days 🔍
12/13/2018 +0 days 🔍
12/13/2018 +0 days 🔍
12/14/2018 +1 days 🔍
12/14/2018 +0 days 🔍
12/14/2018 +0 days 🔍
12/16/2018 +2 days 🔍
06/19/2023 +1646 days 🔍

Sourcesinfo

Product: wordpress.com

Advisory: DLA 1673-1⛔
Researcher: Sam Thomas
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-20148 (🔍)
GCVE (CVE): GCVE-0-2018-20148
GCVE (VulDB): GCVE-100-127993
SecurityFocus: 106220 - WordPress Prior to 5.0.1 Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 12/16/2018 10:28
Updated: 06/19/2023 10:46
Changes: 12/16/2018 10:28 (76), 06/07/2020 14:56 (2), 06/19/2023 10:46 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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