CVE-2026-30242

High

Published: 06 March 2026

Published

06 March 2026

Modified

10 March 2026

KEV Added

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Patch

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CVSS Score 8.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

EPSS Score 0.0001 2.1th percentile

Risk Priority 17 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-30242 is a high-severity SSRF (CWE-918) vulnerability in Plane Plane. Its CVSS base score is 8.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 2.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 AC-4 (Information Flow Enforcement) and SI-10 (Information Input Validation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Requires validation of untrusted inputs such as webhook URLs to reject private/internal IP addresses, directly preventing SSRF exploitation.

AC-4 Information Flow Enforcement good match

prevent

Enforces information flow control policies that prohibit the application server from initiating connections to disallowed internal network destinations.

SC-7 Boundary Protection partial match

preventdetect

Monitors and controls communications at internal boundaries to block or detect outbound requests from the application to private IP ranges.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1552.005 Cloud Instance Metadata API Credential Access

Adversaries may attempt to access the Cloud Instance Metadata API to collect credentials and other sensitive data.

attack.mitre.org →

Why these techniques?

SSRF in exposed web app (Plane) directly matches T1190 exploitation; explicit targeting of 169.254.169.254 plus full response read-back enables T1552.005 cloud metadata credential access.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD 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.

Deeper analysisAI

CVE-2026-30242 is a Server-Side Request Forgery (SSRF) vulnerability in Plane, an open-source project management tool. Prior to version 1.2.3, the webhook URL validation in plane/app/serializers/webhook.py only checks if the IP address is loopback using ip.is_loopback. This insufficient validation permits the creation of webhooks targeting private or internal network addresses, including 10.x.x.x, 172.16.x.x, 192.168.x.x, and 169.254.169.254 ranges.

An attacker with a workspace ADMIN role can exploit this vulnerability by creating a malicious webhook with an internal target URL. When webhook events are triggered, the Plane server issues requests to these internal addresses and stores the full responses, allowing the attacker to read sensitive internal network data via SSRF with complete response read-back. The vulnerability has a CVSS v3.1 base score of 8.5 (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N) and is associated with CWE-918: Server-Side Request Forgery.

The vulnerability has been patched in Plane version 1.2.3. Security practitioners should upgrade to this version or later. Additional details are available in the release notes at https://github.com/makeplane/plane/releases/tag/v1.2.3 and the GitHub security advisory at https://github.com/makeplane/plane/security/advisories/GHSA-fpx8-73gf-7x73.