CVE-2018-20101

Import users from CSV with meta <= 1.12 - Import Cross-Site Scripting

2018-12-11 00:00
Slawek Zytko

Strategic Overview

Status
Patched in 1.12.1
Affected Plugin
Import and export users and customers
Affected Version
< 1.12.1
CVSS
6.1Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2018-20101
View all Import and export users and customers vulnerabilities

At a glance

CVE-2018-20101 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Import and export users and customers WordPress plugin, affecting versions < 1.12.1. 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 1.12.1; sites on affected versions should update now. Disclosed December 2018, reported by Slawek Zytko.

Vulnerability Overview

The codection "Import users from CSV with meta" plugin before 1.12.1 for WordPress allows XSS via the value of a cell.

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 Import and export users and customers < 1.12.1 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 Import and export users and customers the fix is 1.12.1: builds < 1.12.1 are affected, anything from 1.12.1 onward is not.

Remediation

Update to version 1.12.1, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Import and export users and customers: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Import and export users and customers 1.12.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2018-20101https://www.wordfence.com/threat-intel/vulnerabilities/id/1b423aca-e0d2-487d-a861-a2b589c2a62ehttps://nvd.nist.gov/vuln/detail/CVE-2018-20101

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C