CVE-2026-43878Public exploitNetwork attack vector

Reflected XSS via unescaped Meet credentials

Published May 11, 2026 · Updated May 11, 2026

Reflected XSS in AVideo 29.0 and earlier allows remote attackers to run JavaScript in a victim's browser through a crafted Meet URL. User::loginFromRequestToGet concatenates raw user and pass parameters, and plugin/Meet/iframe.php writes the result into a double-quoted JavaScript string without encoding. A victim must open the URL, and unauthenticated reachability requires a public Meet schedule; injected script then runs with the AVideo origin's access.

CVSS severity6.1
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in AVideo 29.0 and earlier allows remote attackers to run JavaScript in a victim's browser through a crafted Meet URL. User::loginFromRequestToGet concatenates raw user and pass parameters, and plugin/Meet/iframe.php writes the result into a double-quoted JavaScript string without encoding. A victim must open the URL, and unauthenticated reachability requires a public Meet schedule; injected script then runs with the AVideo origin's access.

The record

CVE
CVE-2026-43878
Published
May 11, 2026
Updated
May 11, 2026
Vendor
World Wide Broadcast Network
Product
AVideo
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

World Wide Broadcast Network · AVideoversion=<= 29.0

Published CVSS scores

6.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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