CVE-2023-33930

Unlimited Elements For Elementor (Free Widgets, Addons, Templates) <= 1.5.66 - Zip Extraction to Arbitrary File Upload in File Manager

2023-05-22 00:00

Strategic Overview

Status: Patched in 1.5.67
Affected Plugin: Unlimited Elements For Elementor
Affected Version: <= 1.5.66
CVSS: 9.9Critical
Weakness type: CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE: CVE-2023-33930

View all Unlimited Elements For Elementor vulnerabilities

At a glance

CVE-2023-33930 is a critical-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Unlimited Elements For Elementor WordPress plugin, affecting versions <= 1.5.66. It carries a CVSS score of 9.9 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). The issue is fixed in version 1.5.67; sites on affected versions should update now. Disclosed May 2023, reported by Achref Ben Thameur.

Vulnerability Overview

The Unlimited Elements For Elementor (Free Widgets, Addons, Templates) for WordPress is vulnerable to arbitrary file uploads due to missing file type validation of files within zip files in the File Manager functionality in versions up to, and including, 1.5.66 . This makes it possible for authenticated attackers, with contributor-level permissions and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.

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 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 Unlimited Elements For Elementor <= 1.5.66 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 Unlimited Elements For Elementor the fix is 1.5.67: builds <= 1.5.66 are affected, anything from 1.5.67 onward is not.

Remediation

Update to version 1.5.67, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Unlimited Elements For Elementor: 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: Unlimited Elements For Elementor 1.5.67 closes this, and updating the plugin is the step that ends it.

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External References

https://www.cve.org/CVERecord?id=CVE-2023-33930 https://www.wordfence.com/threat-intel/vulnerabilities/id/f600361c-cf7a-498c-aa3d-beeb28d27101 https://nvd.nist.gov/vuln/detail/CVE-2023-33930

Related records

Same weakness class

Other vulnerabilities in Unlimited Elements For Elementor

CVSS Vector

9.9

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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