CVE-2026-89254Public exploitNetwork attack vectorHinoki check available

Stored script execution via unsanitized field name

Published Sep 11, 2026 · Updated Sep 11, 2026

Stored XSS in the CustomizeUser plugin for WWBN AVideo allows remote authenticated users to execute scripts in other users' browsers. add.json.php stores field_name without sanitization, and typeToHTML and extraInfo.php interpolate it into HTML labels and placeholders without encoding. Planting requires administrator access; execution occurs when an administrator views extra information or when a user opens an enabled profile form.

CVSS severity8.7
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in the CustomizeUser plugin for WWBN AVideo allows remote authenticated users to execute scripts in other users' browsers. add.json.php stores field_name without sanitization, and typeToHTML and extraInfo.php interpolate it into HTML labels and placeholders without encoding. Planting requires administrator access; execution occurs when an administrator views extra information or when a user opens an enabled profile form.

The record

CVE
CVE-2026-89254
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
WWBN
Product
AVideo
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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 <=c3edcc274c389816d434acadac07ee78eaf330c1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WWBN · AVideoversion=0 <=c3edcc274c389816d434acadac07ee78eaf330c1

Published CVSS scores

8.7GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

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

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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