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WebinarIgnition CVE-2026-42758

| EUVDEUVD-2026-32207 CRITICAL
Incorrect Privilege Assignment (CWE-266)
2026-05-27 audit@patchstack.com GHSA-pw7f-5523-7q8h
9.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

1
Analysis Generated
May 27, 2026 - 19:49 vuln.today

DescriptionCVE.org

Incorrect Privilege Assignment vulnerability in Saleswonder Team: Tobias WebinarIgnition webinar-ignition allows Privilege Escalation.This issue affects WebinarIgnition: from n/a through < 4.08.253.

AnalysisAI

Privilege escalation in the WebinarIgnition WordPress plugin (Saleswonder Team: Tobias) affects all versions through 4.08.252 and allows remote attackers to obtain elevated privileges due to incorrect privilege assignment. The CVSS 9.8 rating reflects network-reachable, unauthenticated exploitation with full confidentiality, integrity, and availability impact. No public exploit identified at time of analysis, and the EPSS score is very low (0.04%, 13th percentile), indicating no observed exploitation activity despite the critical severity.

Technical ContextAI

WebinarIgnition is a self-hosted WordPress plugin used to build and run webinar and landing pages inside a WordPress site. The root cause is classified as CWE-266 (Incorrect Privilege Assignment), meaning the plugin grants a privilege level to a user or request context that should not receive it. In WordPress plugins this class of flaw typically stems from an action handler or REST/AJAX endpoint that fails to bind capability checks (current_user_can) or nonce validation to a privileged operation, allowing that operation to run under broader rights than intended. The advisory does not name the exact vulnerable function, and no CPE strings were provided in the input, so the affected component is identified only by the plugin slug 'webinar-ignition'.

RemediationAI

Vendor-released patch: 4.08.253 - upgrade the WebinarIgnition plugin to version 4.08.253 or later, since the vulnerability affects all releases prior to it. Apply the update through the WordPress plugin updater or by replacing the plugin files, then confirm the installed version is 4.08.253+. If immediate patching is not possible, deactivate the WebinarIgnition plugin entirely until it can be updated (trade-off: any live webinar/landing pages served by the plugin go offline), and restrict access to the plugin's AJAX/REST endpoints (admin-ajax.php actions and any wp-json routes the plugin registers) at the WAF or reverse proxy layer (trade-off: may break legitimate front-end webinar functionality). Review user roles and remove any unexpected privileged accounts created while the vulnerable version was exposed. See the Patchstack advisory for details: https://patchstack.com/database/Wordpress/Plugin/webinar-ignition/vulnerability/wordpress-webinarignition-plugin-4-08-253-privilege-escalation-vulnerability?_s_id=cve

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CVE-2026-42758 vulnerability details – vuln.today

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