CVE-2026-6439Network attack vector

Administrator-level stored XSS via unescaped language setting

Published Apr 17, 2026 · Updated Apr 17, 2026

Stored cross-site scripting in Jose Conti VideoZen 1.0.1 and earlier allows remote authenticated users to inject scripts into plugin settings. The videozen_conf() function saves the lang POST parameter with update_option() without sanitization and later echoes it inside a textarea without esc_textarea() or equivalent output escaping. Administrator-level access is required to store the payload, which executes in the browser of any user who opens the affected settings page.

CVSS severity4.4
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Jose Conti VideoZen 1.0.1 and earlier allows remote authenticated users to inject scripts into plugin settings. The videozen_conf() function saves the lang POST parameter with update_option() without sanitization and later echoes it inside a textarea without esc_textarea() or equivalent output escaping. Administrator-level access is required to store the payload, which executes in the browser of any user who opens the affected settings page.

The record

CVE
CVE-2026-6439
Published
Apr 17, 2026
Updated
Apr 17, 2026
Vendor
Jose Conti
Product
VideoZen
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Jose Conti · VideoZenversion=0 <=1.0.1

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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