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CVE-2025-47935

7.5 · HIGH

Multer is a node.js middleware for handling `multipart/form-data`.

Published May 19, 2025CWE-401EPSS 0.80%

Overview

CVE-2025-47935 is a high-severity vulnerability. It was published on May 19, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Multer is a node.js middleware for handling `multipart/form-data`. Versions prior to 2.0.0 are vulnerable to a resource exhaustion and memory leak issue due to improper stream handling. When the HTTP request stream emits an error, the internal `busboy` stream is not closed, violating Node.js stream safety guidance. This leads to unclosed streams accumulating over time, consuming memory and file descriptors. Under sustained or repeated failure conditions, this can result in denial of service, requiring manual server restarts to recover. All users of Multer handling file uploads are potentially impacted. Users should upgrade to 2.0.0 to receive a patch. No known workarounds are available.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/expressjs/multer/commit/2c8505f207d923dd8de13a9f93a4563e59933665GitHubgithub.com/expressjs/multer/pull/1120GitHubgithub.com/expressjs/multer/security/advisories/GHSA-44fp-w29j-9vj5

How CyberStrike helps

Frequently asked questions

What is CVE-2025-47935?

CVE-2025-47935 is a high-severity vulnerability. It was published on May 19, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-47935?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-47935?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-47935?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-47935 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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