CVE-2026-39527 MEDIUM

CVE-2026-39527: WordPress WpStream plugin < 4.11.2 - Arbitrary File Upload vulnerability

Vendor Sc Internet Vivoo
Product WpStream
Weakness CWE-434 · Unrestricted file upload
Published June 15, 2026
Last update June 15, 2026
View on NVD All CVEs

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions.

Explanation of Vulnerability in Simple Terms

02Summary

WpStream versions before 4.11.2 do not properly validate uploaded files, allowing authenticated users to upload files that may not be intended for the application. An attacker with low-level access can upload malicious files to degrade site integrity or availability. Update to version 4.11.2 or later to restrict file uploads to safe types.

What an attacker can do

03Attacker Capabilities

Upload files that compromise site integrity or cause the site to malfunction.

Potential impact on your site

04Site Impact

Malicious files uploaded by compromised or rogue user accounts could damage site data or cause service disruption.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege user account on the site.

Key dates

06Disclosure timeline

June 15, 2026 CVE published
June 15, 2026 Record updated

Related vulnerabilities

08Related CVE

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