CVE-2026-34247Public exploitNetwork attack vector

Authenticated poster overwrite via missing ownership check

Published Mar 27, 2026 · Updated Mar 27, 2026

Missing authorization in AVideo 26.0 and earlier allows remote authenticated users to overwrite scheduled live-stream posters. The plugin/Live/uploadPoster.php endpoint trusts live_schedule_id after checking only User::isLogged(), then moves the uploaded file without verifying schedule ownership. Any logged-in account can enumerate schedule IDs, deface another user's poster, send false offline notices, and expose the owner's broadcast key and user ID.

CVSS severity5.4
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in AVideo 26.0 and earlier allows remote authenticated users to overwrite scheduled live-stream posters. The plugin/Live/uploadPoster.php endpoint trusts live_schedule_id after checking only User::isLogged(), then moves the uploaded file without verifying schedule ownership. Any logged-in account can enumerate schedule IDs, deface another user's poster, send false offline notices, and expose the owner's broadcast key and user ID.

The record

CVE
CVE-2026-34247
Published
Mar 27, 2026
Updated
Mar 27, 2026
Vendor
World Wide Broadcast Network
Product
AVideo
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 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=<= 26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

World Wide Broadcast Network · AVideoversion=<= 26.0

Published CVSS scores

5.4GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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 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-862Missing Authorization
T1565.001Stored Data Manipulation

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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