CVE-2026-84767Network attack vectorHinoki check available

Unauthenticated application-state changes via Stripe Connect handler

Published Sep 3, 2026 · Updated Sep 3, 2026

Broken access control in Nexcess BookIt 2.6.0.3 and earlier allows remote attackers to alter application state without authentication. The 2.6.0.4 changelog identifies hardening of the Stripe Connect payment handler, but neither the CNA record nor that changelog discloses which request or authenticity check accepts untrusted data. A network path to the WordPress plugin is sufficient; the published assessment limits the consequence to low-integrity changes without data disclosure or service interruption.

CVSS severity5.3
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Broken access control in Nexcess BookIt 2.6.0.3 and earlier allows remote attackers to alter application state without authentication. The 2.6.0.4 changelog identifies hardening of the Stripe Connect payment handler, but neither the CNA record nor that changelog discloses which request or authenticity check accepts untrusted data. A network path to the WordPress plugin is sufficient; the published assessment limits the consequence to low-integrity changes without data disclosure or service interruption.

The record

CVE
CVE-2026-84767
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
The Events Calendar
Product
BookIt
Classifications
CWE-345, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=2.6.0.3 changes=[{"at":"2.6.0.4","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Events Calendar · BookItversion=n/a <=2.6.0.3 changes=[{"at":"2.6.0.4","status":"unaffected"}]

Published CVSS scores

5.3PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo