ZDF
Sign inSign up

Vulnerabilities

Security fix · CVE-2025-43865

React Router is a router for React.

Published Apr 25, 2025 · catalog updated Apr 25, 2025 · React Router is a

Check if you run it

No confirmed exploitation is on record for CVE-2025-43865. EPSS is 0.80%. Act only if a listed version of React Router is a is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (React Router is a).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.80%
Remediation
Version ranges on file
Affected products
vendor remix-run react-router 7.0, < 7.5.2

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor remix-run react-router 7.0, < 7.5.27.0, < 7.5.2

How to fix CVE-2025-43865

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-43865. EPSS is 0.80%. Act only if a listed version of React Router is a is installed.

Which versions are affected?

Compare what you have installed with remix-run react-router 7.0, < 7.5.2 7.0, < 7.5.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.80%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 25, 2025 · EUVD

    Detected

    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.

  2. Apr 25, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-43865

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-43865

    30-day exploitation probability 0.8%

    first.org
  • EUVDVulnerability recordEUVD-2025-11979

    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. T

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.