CVE-2026-30242
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
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| plane | plane | to 1.2.3 (exc) |
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, upgrade the Plane project to version 1.2.3 or later, where the webhook URL validation issue has been patched.