CVE-2026-42758

WebinarIgnition – Live, Automated & Evergreen Webinar System also for WooCommerce < 4.08.253 - Unauthenticated Privilege Escalation

2026-05-30 00:00

Strategic Overview

Status: Patched in 4.08.253
Affected Plugin: WebinarIgnition – Live, Automated & Evergreen Webinar System also for WooCommerce
Affected Version: < 4.08.253
CVSS: 9.8Critical
Weakness type: CWE-266 · Incorrect Privilege Assignment
CVE: CVE-2026-42758

View all WebinarIgnition – Live, Automated & Evergreen Webinar System also for WooCommerce vulnerabilities

At a glance

CVE-2026-42758 is a critical-severity Incorrect Privilege Assignment vulnerability in the WebinarIgnition WordPress plugin, affecting versions < 4.08.253. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 4.08.253; sites on affected versions should update now. Disclosed May 2026, reported by hhhai.

Vulnerability Overview

The WebinarIgnition – Live, Automated & Evergreen Webinar System also for WooCommerce plugin for WordPress is vulnerable to Privilege Escalation in all versions up to 4.08.253 (exclusive). This makes it possible for unauthenticated attackers to elevate their privileges to that of a higher level user.

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. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-266: Incorrect Privilege Assignment

A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.

Remediation

Update to version 4.08.253, 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: WebinarIgnition 4.08.253 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-42758 https://www.wordfence.com/threat-intel/vulnerabilities/id/28713983-86ef-45d1-9258-d1a4feedcadd https://nvd.nist.gov/vuln/detail/CVE-2026-42758

Related records

Same weakness class

8.1CVE-2026-42757: WebinarIgnition Arbitrary File DeletionCVE-2026-42757

Other vulnerabilities in WebinarIgnition – Live, Automated & Evergreen Webinar System also for WooCommerce

CVSS Vector

9.8

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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