Contact Form 7 <= 5.3.1 - Arbitrary File Upload via Bypass

2020-12-17 00:00

Jinson Varghese Behanan

Strategic Overview

Status

Patched in 5.3.2

Affected PluginContact Form 7

Affected Version< 5.3.2

CVSS8.1High

CVECVE-2020-35489

View all Contact Form 7 vulnerabilities

Vulnerability Overview

The Contact Form 7 plugin for WordPress is vulnerable to arbitrary file uploads in versions up to 5.3.2. This is due to the fact that the plugin allows filenames to contain special characters which may make extension filter evasion possible on certain configurations. Our team was not able to reproduce this issue which leads us to believe there is a high attack complexity or special configuration requirement.

Technical Analysis

REMEDIATION: Update to version 5.3.2, or a newer patched version --- IDENTIFIER: CWE-434 (Unrestricted Upload of File with Dangerous Type) The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

External References

https://www.cve.org/CVERecord?id=CVE-2020-35489 https://www.wordfence.com/threat-intel/vulnerabilities/id/c2f54e8d-9e81-4902-9111-b826ef5da164

CVSS Vector

8.1

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

Base

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

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