CVE-2018-9864

WP Live Chat Support <= 8.0.05 - Stored Cross-Site Scripting

2018-04-09 00:00

Strategic Overview

Status: Patched in 8.0.06
Affected Plugin: 3CX Free Live Chat, Calls & Messaging
Affected Version: <= 8.0.05
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2018-9864

View all 3CX Free Live Chat, Calls & Messaging vulnerabilities

At a glance

CVE-2018-9864 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the 3CX Free Live Chat, Calls & Messaging WordPress plugin, affecting versions <= 8.0.05. 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 8.0.06; sites on affected versions should update now. Disclosed April 2018, reported by Luigi Gubello.

Vulnerability Overview

The WP Live Chat Support plugin before 8.0.06 for WordPress has stored XSS via the Name field.

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 3CX Free Live Chat, Calls & Messaging <= 8.0.05 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 3CX Free Live Chat, Calls & Messaging the fix is 8.0.06: builds <= 8.0.05 are affected, anything from 8.0.06 onward is not.

Remediation

Update to version 8.0.06, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to 3CX Free Live Chat, Calls & Messaging: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: 3CX Free Live Chat, Calls & Messaging 8.0.06 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2018-9864 https://www.wordfence.com/threat-intel/vulnerabilities/id/ab58a6e8-624b-4268-a95a-0e004f8e8c86 https://nvd.nist.gov/vuln/detail/CVE-2018-9864

Related records

Same weakness class

Other vulnerabilities in 3CX Free Live Chat, Calls & Messaging

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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