VulnerabilityDeferred
CVE-2025-43865
This allows to completely spoof its contents and modify all the values of the data object passed to the HTML.
HIGH 8.2EPSS 0.80%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.80%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- EPSS
- 0.80% probability · 54th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-345
- Source
- security-advisories@github.com
References
- https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08a69868a/packages/react-router/lib/server-runtime/routes.ts#L87
- https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b354b70111
- https://github.com/remix-run/react-router/security/advisories/GHSA-cpj6-fhp6-mr6j
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.