CVE-2026-43876Public exploitNetwork attack vector

Authenticated phishing emails via unsanitized message rendering

Published May 11, 2026 · Updated May 11, 2026

HTML injection in AVideo 29.0 and earlier allows remote authenticated users to send platform-branded phishing email to channel subscribers. notifySubscribers.json.php passes the raw message parameter to sendSiteEmail, which inserts it into an HTML template and renders it with PHPMailer without sanitization or encoding. Upload permission and a same-origin request are required; the resulting email can contain phishing links, tracking pixels, or spoofed interface content for as many as 10,000 channel subscribers.

CVSS severity6.4
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in AVideo 29.0 and earlier allows remote authenticated users to send platform-branded phishing email to channel subscribers. notifySubscribers.json.php passes the raw message parameter to sendSiteEmail, which inserts it into an HTML template and renders it with PHPMailer without sanitization or encoding. Upload permission and a same-origin request are required; the resulting email can contain phishing links, tracking pixels, or spoofed interface content for as many as 10,000 channel subscribers.

The record

CVE
CVE-2026-43876
Published
May 11, 2026
Updated
May 11, 2026
Vendor
World Wide Broadcast Network
Product
AVideo
Classifications
CWE-79, T1566.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 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=<= 29.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

World Wide Broadcast Network · AVideoversion=<= 29.0

Published CVSS scores

6.4GitHubCVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1566.002Spearphishing Link

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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