CVE-2026-72547Network attack vectorHinoki check available

Cross-account attendee injection via unchecked event ID

Published Aug 11, 2026 · Updated Aug 11, 2026

Authorization bypass in Attendize through commit 9289acb allows remote authenticated users to import attendees into other accounts' events. The postImportAttendee endpoint loads a caller-supplied event ID without checking that the requesting organizer account owns the target event. Any authenticated organizer can cross account boundaries and inject bulk attendee data, altering another account's event records.

CVSS severity7.1
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in Attendize through commit 9289acb allows remote authenticated users to import attendees into other accounts' events. The postImportAttendee endpoint loads a caller-supplied event ID without checking that the requesting organizer account owns the target event. Any authenticated organizer can cross account boundaries and inject bulk attendee data, altering another account's event records.

The record

CVE
CVE-2026-72547
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Attendize
Product
Attendize
Classifications
CWE-639, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 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=0 <=9289acb

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Attendize · Attendizeversion=0 <=9289acb

Published CVSS scores

7.1TuranSecCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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