CVE-2026-14823Public exploitNetwork attack vector

Contributor-level event data overwrite via unchecked post ID

Published Aug 1, 2026 · Updated Aug 1, 2026

IDOR in Nexcess Event Tickets and Registration before 5.29.0.1 allows remote authenticated users to overwrite another owner's seating data. The layout update and removal AJAX actions accept a caller-controlled postId after nonce validation but omit the capability check needed to verify access to the referenced event. Contributor-level access and an event using Seating are required; successful requests rewrite layouts, capacity, ticket stock, and attendee seat labels.

CVSS severity2.2
Low
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in Nexcess Event Tickets and Registration before 5.29.0.1 allows remote authenticated users to overwrite another owner's seating data. The layout update and removal AJAX actions accept a caller-controlled postId after nonce validation but omit the capability check needed to verify access to the referenced event. Contributor-level access and an event using Seating are required; successful requests rewrite layouts, capacity, ticket stock, and attendee seat labels.

The record

CVE
CVE-2026-14823
Published
Aug 1, 2026
Updated
Aug 1, 2026
Vendor
The Events Calendar
Product
Event Tickets and Registration
Classifications
CWE-639, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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 <5.29.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Events Calendar · Event Tickets and Registrationversion=0 <5.29.0.1

Published CVSS scores

2.2INCIBE-CERTCVSS:3.1/AV:N/AC:H/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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