WordPress Core < 5.0.1 - Stored Cross-Site Scripting via File Uploads

2018-12-12 00:00

Tim Coen

Strategic Overview

Status

Patched in 3.7.28

Affected CoreWordPress 5.0

Affected Version3.7 – 5.0 · 15 branches

CVSS6.4Medium

CVECVE-2018-20149

View all WordPress 5.0 vulnerabilities

Vulnerability Overview

In WordPress before 4.9.9 and 5.x before 5.0.1, when the Apache HTTP Server is used, authors could upload crafted files that bypass intended MIME type restrictions, leading to XSS, as demonstrated by a .jpg file without JPEG data.

Technical Analysis

REMEDIATION: Update to one of the following versions, or a newer patched 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, 5.0.1 --- IDENTIFIER: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

External References

https://www.cve.org/CVERecord?id=CVE-2018-20149 https://www.wordfence.com/threat-intel/vulnerabilities/id/4df635b8-4c56-4b24-8446-8e39e6fe7441

CVSS Vector

6.4

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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