7.5

CVE-2025-47935: expressjs multer

CVSS: 7.5v3.1HighDeferred
AliasesCGA-396r-p8x9-8vc5CGA-68m4-q34w-5w2gGHSA-44fp-w29j-9vj5
Published 19-05-2025Last modified 27-05-2025
Open JSON

Vulnerability summary

CVE-2025-47935 is a high (CVSS 7.5) vulnerability in expressjs multer. EPSS estimates a 0.80% chance of exploitation in the next 30 days, higher than 55.6% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.80%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 2
CGA-8XG2-M9VQ-JFXRCGA-WCGF-2MRV-GQJX

Timeline

  1. 19-05-2025
    PublishedVulnerability first disclosed.
  2. 27-05-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.80%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

+0.01 pp

From 0.78% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.80%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard1 product
  • grafana-image-renderer< 3.12.6-r0
Expressjs1 product
Npm1 product
  • multer< 2.0.0
Wolfi1 product
  • grafana-image-renderer< 3.12.6-r0

4 vendors · 4 products

References

6 links