CVE-2026-13176
Received Received - Intake

Blind SSRF via Unvalidated Webhook in Eventin WordPress Plugin

Publication date: 2026-08-21

Last updated on: 2026-08-21

Assigner: WPScan

Description
The Eventin WordPress plugin before 4.1.21 does not validate a user-supplied webhook URL stored on events nor verify event ownership, allowing users with contributor-level access and above to trigger blind server-side requests to arbitrary hosts.

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Meta Information

Published
2026-08-21
Last Modified
2026-08-21
Generated
2026-08-21
AI Q&A
2026-08-21
EPSS Evaluated
N/A
NVD
CVE-2026-13176
EUVD
EUVD-2026-63907

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
eventin eventin_wordpress_plugin to 4.1.21 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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Executive Summary

CVE-2026-13176 is a Server-Side Request Forgery (SSRF) vulnerability in the Eventin WordPress plugin before version 4.1.21. It allows users with contributor-level access or higher to store a malicious webhook URL on events without validation or ownership verification. This enables attackers to trigger blind SSRF requests to arbitrary hosts.

Detection Guidance

Check WordPress plugin versions for Eventin. If using version before 4.1.21, the system is vulnerable. Inspect event configurations for unauthorized webhook URLs or suspicious network requests.

Impact Analysis

An attacker could exploit this to make the server send requests to internal or external systems, potentially accessing sensitive data or services. This could lead to data breaches, unauthorized access, or further attacks on connected systems.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection requirements or HIPAA's safeguards for protected health information. Compliance may be compromised if sensitive data is exposed through SSRF attacks.

Mitigation Strategies

Update the Eventin WordPress plugin to version 4.1.21 or later immediately. Review and remove any unauthorized webhook URLs from events. Restrict contributor-level access to trusted users only.

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