8.2

CVE-2025-43865: remix-run react-router

CVSS: 8.2v3.1HighDeferred
AliasesGHSA-cpj6-fhp6-mr6j
Published 25-04-2025Last modified 25-04-2025
Open JSON

Vulnerability summary

CVE-2025-43865 is a high (CVSS 8.2) vulnerability in remix-run react-router. EPSS estimates a 0.80% chance of exploitation in the next 30 days, higher than 55.8% of scored vulnerabilities.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.2/10
010
High · v3.1 (CVE.org)
EPSS score
0.80%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-04-2025
    PublishedVulnerability first disclosed.
  2. 25-04-2025
    Last modifiedVulnerability information updated.

Description

React Router is a router for React. In versions on the 7.0 branch prior to version 7.5.2, it's possible to modify pre-rendered data by adding a header to the request. This allows to completely spoof its contents and modify all the values ​​of the data object passed to the HTML. This issue has been patched in version 7.5.2.

CVSS metrics

3 scores · 3 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

0.00 pp

From 0.80% on 19-09-2026

19-09-202619-10-2026
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

Npm1 product
  • react-router≥ 7.0.0-pre.0, < 7.5.2
Remix-run1 product

2 vendors · 2 products

References

5 links