CVE-2018-18379

Elementor Pro <= 2.0.9 - Cross-Site Scripting

2018-10-26 00:00

Strategic Overview

Status: Patched in 2.0.10
Affected Plugin: Elementor Website Builder Pro
Affected Version: < 2.0.10
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2018-18379

View all Elementor Website Builder Pro vulnerabilities

At a glance

CVE-2018-18379 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Elementor Website Builder Pro WordPress plugin, affecting versions < 2.0.10. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.0.10; sites on affected versions should update now. Disclosed October 2018, reported by Christopher Vella.

Vulnerability Overview

The elementor-edit-template class in wp-admin/customize.php in the Elementor Pro plugin before 2.0.10 for WordPress has XSS.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Elementor Website Builder Pro < 2.0.10 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Elementor Website Builder Pro the fix is 2.0.10: builds < 2.0.10 are affected, anything from 2.0.10 onward is not.

Remediation

Update to version 2.0.10, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Elementor Website Builder Pro: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Elementor Website Builder Pro 2.0.10 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2018-18379 https://www.wordfence.com/threat-intel/vulnerabilities/id/e340f400-1d20-4fa1-9cc7-8c0f49075bc0 https://nvd.nist.gov/vuln/detail/CVE-2018-18379

Related records

Same weakness class

Other vulnerabilities in Elementor Website Builder Pro

CVSS Vector

6.1

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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