CVE-2026-86188Public exploitNetwork attack vector

Cross-user script execution via unsafe callback dispatch

Published Sep 5, 2026 · Updated Sep 8, 2026

Cross-site scripting in WWBN AVideo 29.0 and earlier allows remote attackers to execute JavaScript in other users' browsers. YPTSocket resolves an attacker-supplied callback name on window and passes peer-controlled data to avideoConfirmHTML, which assigns it to innerHTML. The plugin must be enabled, but its token endpoint requires no authentication; exploitation can read session data and issue requests as an online victim.

CVSS severity6.9
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in WWBN AVideo 29.0 and earlier allows remote attackers to execute JavaScript in other users' browsers. YPTSocket resolves an attacker-supplied callback name on window and passes peer-controlled data to avideoConfirmHTML, which assigns it to innerHTML. The plugin must be enabled, but its token endpoint requires no authentication; exploitation can read session data and issue requests as an online victim.

The record

CVE
CVE-2026-86188
Published
Sep 5, 2026
Updated
Sep 8, 2026
Vendor
WWBN
Product
AVideo
Classifications
CWE-79, CWE-306, CWE-184, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <=29.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WWBN · AVideoversion=0 <=29.0

Published CVSS scores

7.2VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
10.0WWBN/AVideoCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
6.9VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-306Missing Authentication for Critical Function
CWE-184Incomplete List of Disallowed Inputs
T1059.007JavaScript/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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