What is the CVSS score of CVE-2025-6087?

CVE-2025-6087 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.4%.

How to fix or mitigate CVE-2025-6087?

Within 24 hours: Inventory all production deployments using @opennextjs/cloudflare and assess exposure; disable the /_next/image endpoint if not business-critical. Within 7 days: Implement WAF rules blocking suspicious /_next/image requests with non-standard URL parameters; review access logs for exploitation attempts. Within 30 days: Migrate to a patched version once available or migrate away from the vulnerable package; conduct post-incident review of any potential compromises.

Next.js CVE-2025-6087

EUVD-2025-18433 CRITICAL

Server-Side Request Forgery (SSRF) (CWE-918)

2025-06-16 cna@cloudflare.com

GHSA-c7mq-gh6q-6q7c

GHSA-rvpw-p7vw-wj3m

Information Disclosure SSRF Node.js Next.js Create Cloudflare Opennext For Cloudflare Cloudflare

9.1

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-918 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V4 - API and Web Service URL allowlisting, SSRF prevention MITRE ATT&CK 2 techniques across 2 tactics: Initial Access, Credential Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS 9.1. EPSS 0.4%. No patch confirmed.
Exploit ScenarioDerived	An attacker could exploit this vulnerability in the affected application to compromise the security of affected deployments, potentially impacting confidentiality, integrity, or availability.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 14, 2026

A remote code execution vulnerability (CVSS 9.1). Critical severity with potential for significant impact on affected systems.

Earlier versions of this analysis (1)

v1 Mar 14, 2026 - 21:59 CVSS 9.1

A Server-Side Request Forgery (SSRF) vulnerability was identified in the @opennextjs/cloudflare package. The vulnerability stems from an unimplemented feature in the Cloudflare adapter for Open Next,

RemediationAI

Monitor vendor channels for patch availability.

Affected Packages

npm @opennextjs/cloudflare fix: 1.3.0, 1.17.1

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in npm

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-918 (Server-Side Request Forgery). CVSS 9.1 indicates critical severity with likely remote exploitation vector.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.1 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

CVE Published

Jun 16, 2025 - 19:15 nvd

CRITICAL 9.1

DescriptionCVE.org

A Server-Side Request Forgery (SSRF) vulnerability was identified in the @opennextjs/cloudflare package. The vulnerability stems from an unimplemented feature in the Cloudflare adapter for Open Next, which allowed unauthenticated users to proxy arbitrary remote content via the /_next/image endpoint.

This issue allowed attackers to load remote resources from arbitrary hosts under the victim site’s domain for any site deployed using the Cloudflare adapter for Open Next.

For example:

https://victim-site.com/_next/image?url=https://attacker.com

In this example, attacker-controlled content from attacker.com is served through the victim site’s domain (victim-site.com), violating the same-origin policy and potentially misleading users or other services.

Impact:

SSRF via unrestricted remote URL loading
Arbitrary remote content loading
Potential internal service exposure or phishing risks through domain abuse

Mitigation:

The following mitigations have been put in place:

Server side updates to Cloudflare’s platform to restrict the content loaded via the /_next/image endpoint to images. The update automatically mitigates the issue for all existing and any future sites deployed to Cloudflare using the affected version of the Cloudflare adapter for Open Next
Root cause fix https://github.com/opennextjs/opennextjs-cloudflare/pull/727 to the Cloudflare adapter for Open Next. The patched version of the adapter is found here @opennextjs/cloudflare@1.3.0 https://www.npmjs.com/package/@opennextjs/cloudflare/v/1.3.0
Package dependency update https://github.com/cloudflare/workers-sdk/pull/9608 to create-cloudflare (c3) to use the fixed version of the Cloudflare adapter for Open Next. The patched version of create-cloudflare is found here: create-cloudflare@2.49.3 https://www.npmjs.com/package/create-cloudflare/v/2.49.3

In addition to the automatic mitigation deployed on Cloudflare’s platform, we encourage affected users to upgrade to @opennext/cloudflare v1.3.0 and use the remotePatterns https://nextjs.org/docs/pages/api-reference/components/image#remotepatterns filter in Next config https://nextjs.org/docs/pages/api-reference/components/image#remotepatterns if they need to allow-list external urls with images assets.

Executive ViewAI

Why It Matters

A critical vulnerability in the Open Next Cloudflare adapter allows attackers to abuse your website's domain to serve malicious content or access internal services without authentication. Any organization using this package is at immediate risk of domain reputation damage, data exposure, and user trust violations until this is remediated.

Business Impact: Severe

Compensating Controls

Implement Web Application Firewall (WAF) rules to block or restrict access to the /_next/image endpoint, particularly requests containing external URL parameters; restrict outbound connections from the application to internal networks only; disable the image optimization feature entirely if not essential to business operations; implement request rate limiting on the endpoint; monitor and log all /_next/image requests for detection of abuse.

Threat Intelligence Overview

EPSS Score

0.4%

Top 42% exploitable

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.4%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +46

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Server-Side Request Forgery HIGH

Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.