High severity · published Jul 17, 2025
CVE-2025-7338
Multer vulnerable to Denial of Service via unhandled exception from malformed request
7.5
CVSS
0.8%
EPSS
No
On KEV
Description
Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.2 allows an attacker to trigger a Denial of Service (DoS) by sending a malformed multi-part upload request. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to version 2.0.2 to receive a patch. No known workarounds are available.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MU
multer · expressjs
1.4.4-lts.1 before 2.0.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-7338
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-7338
cna.openjsf.org
https://cna.openjsf.org/security-advisories.html
github.com
https://github.com/expressjs/multer/commit/adfeaf669f0e7fe953eab191a762164a452d143b
github.com
https://github.com/expressjs/multer/security/advisories/GHSA-fjgf-rc76-4x9p
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