What is the CVSS score of CVE-2026-42757?

CVE-2026-42757 has a CVSS 3.1 base score of 9.9 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of WebinarIgnition are affected by CVE-2026-42757?

WebinarIgnition WordPress plugin versions up to 4.08.253 contain a critical path traversal vulnerability affecting authenticated low-privilege users, allowing arbitrary file deletion that could…

How to fix or mitigate CVE-2026-42757?

Within 24 hours: Audit which user accounts have access to WebinarIgnition; determine whether the plugin is business-critical. Within 7 days: If not essential, disable WebinarIgnition immediately; if required, restrict plugin access to administrators only and implement file-integrity monitoring. Within 30 days: Monitor vendor and Patchstack advisories for patch availability; develop a staged upgrade plan upon release.

WebinarIgnition CVE-2026-42757

EUVD-2026-32205 CRITICAL

Path Traversal (CWE-22)

2026-05-27 audit@patchstack.com

GHSA-3fj5-pxmx-ggjp

Path Traversal

9.9

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.9 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

May 27, 2026 - 19:48 vuln.today

DescriptionCVE.org

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Saleswonder Team: Tobias WebinarIgnition webinar-ignition allows Path Traversal.This issue affects WebinarIgnition: from n/a through < 4.08.253.

AnalysisAI

Path traversal in the WebinarIgnition WordPress plugin (Saleswonder Team: Tobias) affects all versions up to and including 4.08.253 and allows authenticated low-privilege users to manipulate file paths outside the intended plugin directory. The linked Patchstack advisory characterizes the concrete impact as arbitrary file deletion, which can corrupt the WordPress installation or enable further compromise. EPSS probability is very low (0.05%, 15th percentile) and there is no public exploit identified at time of analysis, despite the 9.9 CVSS score.

Technical ContextAI

WebinarIgnition is a commercial WordPress plugin for hosting and managing webinars. The root cause is CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), where user-controllable input is incorporated into a filesystem path without sufficient canonicalization or validation, permitting '../' style sequences to escape the intended base directory. Because it runs inside the WordPress/PHP environment, a successful traversal operates with the web server's privileges across the underlying filesystem; the Patchstack reference frames the resulting primitive as arbitrary file deletion rather than read, meaning attacker-supplied paths reach a delete/unlink operation. No specific CPE strings were supplied beyond the EUVD product entry (WebinarIgnition 0 ≤ 4.08.253).

RemediationAI

Upgrade WebinarIgnition to version 4.08.253, which the advisory identifies as the fixed release (Vendor-released patch: 4.08.253); the version string in the description and the Patchstack advisory URL both point to 4.08.253 as the boundary, so update to that build or later. Until the update is applied, reduce exposure by restricting who holds authenticated WordPress accounts, since exploitation requires at least low-privilege access (PR:L) - audit and remove untrusted or unnecessary accounts, and tighten role capabilities. As a compensating control, place a WAF or virtual patch in front of the site to block requests containing path-traversal sequences ('../', encoded variants) targeting the plugin's endpoints, accepting that WAF rules can be bypassed and may need tuning to avoid false positives. If the plugin is not actively used, deactivate and remove it entirely to eliminate the attack surface. Refer to the Patchstack advisory for details: https://patchstack.com/database/Wordpress/Plugin/webinar-ignition/vulnerability/wordpress-webinarignition-plugin-4-08-253-arbitrary-file-deletion-vulnerability?_s_id=cve