PatchSiren cyber security CVE debrief

CVE-2026-39527 sc Internet Vivoo CVE debrief

CVE-2026-39527 is a medium severity vulnerability (CVSS Score: 5.4) affecting WpStream plugin versions prior to 4.11.2. The vulnerability allows subscribers to upload arbitrary files. The CVE was published on June 15, 2026, at 21:16:46 UTC and last modified on the same day at 21:24:32 UTC.

Vendor: sc Internet Vivoo
Product: WpStream
CVSS: MEDIUM 5.4
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-15
Original CVE updated: 2026-06-15
Advisory published: 2026-06-15
Advisory updated: 2026-06-15

Who should care

Users of WpStream plugin versions prior to 4.11.2 should apply the patch to prevent subscribers from uploading arbitrary files.

Technical summary

The vulnerability has a CVSS vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L and is classified under CWE-434. It allows low-privileged users (subscribers) to upload files without proper restrictions, potentially leading to integrity and availability impacts.

Defensive priority

Medium

Recommended defensive actions

Update WpStream plugin to version 4.11.2 or later.
Review and restrict file upload permissions for subscribers.

Evidence notes

Evidence suggests that the vulnerability was reported by [email protected].

Sources and references

Verified primary and authoritative sources

CVE-2026-39527 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-39527

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-39527 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-39527

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.