CVE-2026-45620Network attack vector

Unauthenticated username enumeration via mention endpoint

Published May 29, 2026 · Updated May 29, 2026

Improper authorization in WWBN AVideo 29.0 and earlier allows remote attackers to enumerate usernames through the mention endpoint. The objects/mention.json.php endpoint accepts an at-prefixed term and calls User::getAllUsers without User::loginCheck() or an administrative gate, returning up to ten matching accounts. No session or user interaction is required; disclosure is limited to valid account identities and does not grant account access.

CVSS severity5.3
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in WWBN AVideo 29.0 and earlier allows remote attackers to enumerate usernames through the mention endpoint. The objects/mention.json.php endpoint accepts an at-prefixed term and calls User::getAllUsers without User::loginCheck() or an administrative gate, returning up to ten matching accounts. No session or user interaction is required; disclosure is limited to valid account identities and does not grant account access.

The record

CVE
CVE-2026-45620
Published
May 29, 2026
Updated
May 29, 2026
Vendor
World Wide Broadcast Network
Product
AVideo
Classifications
CWE-204, CWE-285, T1589
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 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

5.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-204Observable Response Discrepancy
CWE-285Improper Authorization
T1589Gather Victim Identity Information

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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