CVE-2026-39527 Details
Description
Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions.
A vulnerability allowing arbitrary file upload has been identified in the WpStream WordPress plugin, affecting versions prior to 4.11.2. This issue arises from insufficient validation of uploaded files, which could enable malicious users to upload potentially harmful files, such as backdoors, that could be executed to gain unauthorized access to the website.
Users of the WpStream WordPress plugin should update to version 4.11.2 or later. Patchstack users can enable auto-update for vulnerable plugins.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 15, 2026CISA-ADP
Assessed Jun 15, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-434 | Unrestricted Upload of File with Dangerous Type | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| WpStream | < 4.11.2 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 15, 2026 | New CVE Received | [email protected] |