CVE-2026-56347Public exploitNetwork attack vector

Stored XSS via unescaped menu item rendering

Published Jun 20, 2026 · Updated Jun 20, 2026

Stored XSS in the AVideo TopMenu plugin through 26.0 allows remote attackers to execute JavaScript in visitors' browsers. HTMLMenuRight.php, HTMLMenuLeft.php, floatMenu.php, and index.php echo stored icon classes, URLs, and labels into page markup without output encoding. Exploitation requires an administrator to save a crafted item or visit a malicious page while logged in, after which the payload runs for every site visitor.

CVSS severity5.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in the AVideo TopMenu plugin through 26.0 allows remote attackers to execute JavaScript in visitors' browsers. HTMLMenuRight.php, HTMLMenuLeft.php, floatMenu.php, and index.php echo stored icon classes, URLs, and labels into page markup without output encoding. Exploitation requires an administrator to save a crafted item or visit a malicious page while logged in, after which the payload runs for every site visitor.

The record

CVE
CVE-2026-56347
Published
Jun 20, 2026
Updated
Jun 20, 2026
Vendor
World Wide Broadcast Network
Product
AVideo
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 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 <=26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

World Wide Broadcast Network · AVideoversion=0 <=26.0

Published CVSS scores

6.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/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')
T1189Drive-by Compromise

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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