CVE-2025-43864

What it is

React Router is a router for React. Starting in version 7.2.0 and prior to version 7.5.2, it is possible to force an application to switch to SPA mode by adding a header to the request. If the application uses SSR and is forced to switch to SPA, this causes an error that completely corrupts the page. If a cache system is in place, this allows the response containing the error to be cached, resulting in a cache poisoning that strongly impacts the availability of the application. This issue has been patched in version 7.5.2.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

20.5% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2025-04-25 01:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 09:24 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 20.5% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2025-04-25 01:15 UTC

Last modified

2026-06-17 09:24 UTC

Exploit probability

20.5% · EPSS, next 30 days

Weakness

CWE-755

Record status

Deferred

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2025-43864.md and follow it. Check whether this project is affected by CVE-2025-43864. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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