CVE-2020-6008

LifterLMS Wordpress Plugin <= 3.37.14 - Arbitrary File Write

2020-03-31 00:00

Strategic Overview

Status: Patched in 3.37.15
Affected Plugin: LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes
Affected Version: < 3.37.15
CVSS: 9.8Critical
Weakness type: CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE: CVE-2020-6008

View all LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes vulnerabilities

At a glance

CVE-2020-6008 is a critical-severity Unrestricted Upload of File with Dangerous Type vulnerability in the LifterLMS WordPress plugin, affecting versions < 3.37.15. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 3.37.15; sites on affected versions should update now. Disclosed March 2020, reported by Omri Herscovici (Check Point Research).

Vulnerability Overview

LifterLMS Wordpress plugin version below 3.37.15 is vulnerable to arbitrary file write leading to remote code execution.

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, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-434: Unrestricted Upload of File with Dangerous Type

Reaching this weakness in LifterLMS < 3.37.15 takes a caller who can reach the endpoint. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.

If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For LifterLMS the fix is 3.37.15: builds < 3.37.15 are affected, anything from 3.37.15 onward is not.

Remediation

Update to version 3.37.15, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to LifterLMS: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: LifterLMS 3.37.15 closes this, and updating the plugin is the step that ends it.

Firewall
Scanner
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-6008 https://www.wordfence.com/threat-intel/vulnerabilities/id/b39f4467-4764-4850-bdcc-b359a6544b42 https://nvd.nist.gov/vuln/detail/CVE-2020-6008

Related records

Other vulnerabilities in LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes

CVSS Vector

9.8

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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