CVE-2025-48997Public exploitNetwork attack vector

Process crash via unchecked missing field name

Published Jun 3, 2025 · Updated Jun 3, 2025

Uncaught exception in Multer 1.4.4-lts.1 through 2.0.0 allows remote attackers to crash a Node.js process via a nameless file upload. The file-event handler in lib/make-middleware.js forwards a missing field name without validation, allowing later processing to read the length of an undefined value. Exploitation requires a network-reachable multipart upload route and interrupts the hosting application until its Node.js process restarts.

CVSS severity8.7
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncaught exception in Multer 1.4.4-lts.1 through 2.0.0 allows remote attackers to crash a Node.js process via a nameless file upload. The file-event handler in lib/make-middleware.js forwards a missing field name without validation, allowing later processing to read the length of an undefined value. Exploitation requires a network-reachable multipart upload route and interrupts the hosting application until its Node.js process restarts.

The record

CVE
CVE-2025-48997
Published
Jun 3, 2025
Updated
Jun 3, 2025
Vendor
body-parser
Product
Multer
Classifications
CWE-248, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.4.4-lts.1, < 2.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

body-parser · Multerversion=>= 1.4.4-lts.1, < 2.0.1

Published CVSS scores

8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-248Uncaught Exception
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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