CVE-2020-7108

LearnDash 3.0.0-3.1.1 - Reflected Cross Site Scripting issue on the [ld_profile] search field

2020-01-15 00:00

Strategic Overview

Status: Patched in 3.1.2
Affected Plugin: LearnDash LMS
Affected Version: 3.0.0 – 3.1.1
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2020-7108

At a glance

CVE-2020-7108 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the LearnDash LMS WordPress plugin, affecting versions 3.0.0 – 3.1.1. 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 3.1.2; sites on affected versions should update now. Disclosed January 2020, reported by Jinson Varghese Behanan.

Vulnerability Overview

The LearnDash LMS plugin before 3.1.2 for WordPress allows XSS via the ld-profile search 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 LearnDash LMS 3.0.0 – 3.1.1 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 LearnDash LMS the fix is 3.1.2: builds 3.0.0 – 3.1.1 are affected, anything from 3.1.2 onward is not.

Remediation

Update to version 3.1.2, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to LearnDash LMS: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: LearnDash LMS 3.1.2 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-7108 https://www.wordfence.com/threat-intel/vulnerabilities/id/07b1efbd-0caf-412d-ac1b-ab1b27c32b8c https://nvd.nist.gov/vuln/detail/CVE-2020-7108

Related records

Other vulnerabilities in LearnDash LMS

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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