CVE-2026-13171

Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce < 4.1.20 - Unauthenticated User Account Creation

2026-08-10 00:00

Strategic Overview

Status: Patched in 4.1.20
Affected Plugin: Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce
Affected Version: < 4.1.20
CVSS: 5.3Medium
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2026-13171

View all Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce vulnerabilities

At a glance

CVE-2026-13171 is a medium-severity Missing Authorization vulnerability in the Eventin WordPress plugin, affecting versions < 4.1.20. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 4.1.20; sites on affected versions should update now. Disclosed August 2026, reported by Sanjorn Keeratirungsan.

Vulnerability Overview

The Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce plugin for WordPress is vulnerable to user account creation in all versions up to 4.1.20 (exclusive).This makes it possible for unauthenticated attackers to create user accounts when user registration is disabled.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in Eventin < 4.1.20 takes no account at all. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Eventin the fix is 4.1.20: builds < 4.1.20 are affected, anything from 4.1.20 onward is not.

Remediation

Update to version 4.1.20, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: Eventin 4.1.20 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-13171 https://www.wordfence.com/threat-intel/vulnerabilities/id/355d8d4a-2488-4da5-b48f-4f8be6b59170 https://nvd.nist.gov/vuln/detail/CVE-2026-13171

Related records

Same weakness class

Other vulnerabilities in Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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