Elementor Website Builder <= 3.1.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via header_size

2021-03-17 00:00

Ram

Strategic Overview

Status

Patched in 3.1.4

Affected PluginElementor Website Builder – more than just a page builder

Affected Version0.1.0 – 3.1.3

CVSS6.4Medium

CVECVE-2021-24202

View all Elementor Website Builder – more than just a page builder vulnerabilities

Vulnerability Overview

In the Elementor Website Builder WordPress plugin before 3.1.4, the heading widget (includes/widgets/heading.php) accepts a ‘header_size’ parameter. Although the element control lists a fixed set of possible html tags, it is possible for a user with Contributor or above permissions to send a modified ‘save_builder’ request with this parameter set to ‘script’ and combined with a ‘title’ parameter containing JavaScript, which will then be executed when the saved page is viewed or previewed.

Technical Analysis

REMEDIATION: Update to version 3.1.4, 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.cve.org/CVERecord?id=CVE-2021-24202 https://www.wordfence.com/threat-intel/vulnerabilities/id/90f96795-8df7-4388-b58e-fc3611bc215c

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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