CVE-2026-30242
Received Received - Intake
SSRF Vulnerability in Plane Webhook URL Validation Allows Internal Access

Publication date: 2026-03-06

Last updated on: 2026-03-10

Assigner: GitHub, Inc.

Description
Plane is an an open-source project management tool. Prior to version 1.2.3, the webhook URL validation in plane/app/serializers/webhook.py only checks ip.is_loopback, allowing attackers with workspace ADMIN role to create webhooks pointing to private/internal network addresses (10.x.x.x, 172.16.x.x, 192.168.x.x, 169.254.169.254, etc.). When webhook events fire, the server makes requests to these internal addresses and stores the response — enabling SSRF with full response read-back. This issue has been patched in version 1.2.3.
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Meta Information
Published
2026-03-06
Last Modified
2026-03-10
Generated
2026-06-16
AI Q&A
2026-03-07
EPSS Evaluated
2026-06-14
NVD
CVE-2026-30242
EUVD
EUVD-2026-10082
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
plane plane to 1.2.3 (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

This vulnerability exists in the Plane project management tool prior to version 1.2.3. The issue is in the webhook URL validation, which only checks if the IP address is a loopback address. This allows attackers with an ADMIN role in a workspace to create webhooks that point to private or internal network addresses such as 10.x.x.x, 172.16.x.x, 192.168.x.x, or 169.254.169.254.

When webhook events trigger, the server makes requests to these internal addresses and stores the responses. This behavior enables a Server-Side Request Forgery (SSRF) attack where the attacker can read the full response from internal network resources.

The vulnerability was fixed in version 1.2.3 by improving the webhook URL validation.

Impact Analysis

This vulnerability can allow an attacker with ADMIN privileges in a workspace to perform SSRF attacks by creating webhooks that access internal or private network addresses.

As a result, the attacker can potentially access sensitive internal services or data that are not normally exposed externally, leading to information disclosure.

The attacker can read the full response from these internal requests, which may include sensitive configuration, metadata, or other confidential information.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, upgrade the Plane project to version 1.2.3 or later, where the webhook URL validation issue has been patched.

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