WordPress Core 5.9 - 5.9.1 - Authenticated (Contributor+) Stored Cross-Site Scripting

2022-03-11 00:00

Ben Bidner

Strategic Overview

Status

Patched in 5.9.2

Affected CoreWordPress 5.9

Affected Version5.9 – < 5.9.2

CVSS6.4Medium

CVEN/A

View all WordPress 5.9 vulnerabilities

Vulnerability Overview

WordPress Core in versions 5.9 - 5.9.1 is vulnerable to Contributor+ stored Cross-Site Scripting via the double JSON encoded payloads set in the 'isGlobalStylesUserThemeJSON' parameter which is updatable via the post editor.

Technical Analysis

REMEDIATION: Update to version 5.9.2, or a newer patched version --- 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.wordfence.com/threat-intel/vulnerabilities/id/0ddb582a-e966-4c0b-a743-29d8943f846b

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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