WordPress Core < 5.3.1 - Authenticated Stored Cross-Site Scripting

2019-12-13 00:00

Nguyen Van Khanh

Strategic Overview

Status

Patched in 3.7.32

Affected CoreWordPress 5.2

Affected Version3.7 – 5.2.4 · 17 branches

CVSS5.8Medium

CVECVE-2019-16781

View all WordPress 5.2 vulnerabilities

Vulnerability Overview

In WordPress before 5.3.1, authenticated users with lower privileges (like contributors) can inject JavaScript code in the block editor, which is executed within the dashboard. It can lead to an admin opening the affected post in the editor leading to XSS.

Technical Analysis

REMEDIATION: Update to one of the following versions, or a newer patched version: 3.7.32, 3.8.32, 3.9.30, 4.0.29, 4.1.29, 4.2.26, 4.3.22, 4.4.21, 4.5.20, 4.6.17, 4.7.16, 4.8.12, 4.9.13, 5.0.8, 5.1.4, 5.2.5, 5.3.1 --- 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-2019-16781 https://www.wordfence.com/threat-intel/vulnerabilities/id/149eb7ef-be96-442e-925e-01d8d76e3a1a

CVSS Vector

5.8

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

Base

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredLow
User InteractionRequired
ScopeChanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone

This record contains material that is subject to copyright

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/