High severity · published Jun 3, 2025
CVE-2025-48997
Multer vulnerable to Denial of Service via unhandled exception
8.7
CVSS
0.4%
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 2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to `2.0.1` to receive a patch. No known workarounds are available.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% 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, < 2.0.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-48997
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-48997
github.com
https://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9
github.com
https://github.com/expressjs/multer/issues/1233
github.com
https://github.com/expressjs/multer/pull/1256
github.com
https://github.com/expressjs/multer/security/advisories/GHSA-g5hg-p3ph-g8qg
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