CVE-2023-30543

What it is

@web3-react is a framework for building Ethereum Apps . In affected versions the `chainId` may be outdated if the user changes chains as part of the connection flow. This means that the value of `chainId` returned by `useWeb3React()` may be incorrect. In an application, this means that any data derived from `chainId` could be incorrect. For example, if a swapping application derives a wrapped token contract address from the `chainId` *and* a user has changed chains as part of their connection flow the application could cause the user to send funds to the incorrect address when wrapping. This issue has been addressed in PR #749 and is available in updated npm artifacts. There are no known workarounds for this issue. Users are advised to upgrade.

At a glance

Exploitability

Can be exploited over the network with an admin-level account, but needs a user to act. High risk of data tampering.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2023-04-17 22:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 05:54 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.4% in the next 30 days (EPSS).
• Severity: 5.2 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2023-04-17 22:15 UTC

Last modified

2026-06-17 05:54 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-362 · Race condition

Record status

Modified

Affected

• Uniswap web3-react coinbase-wallet ≤ 6.2.14
• Uniswap web3-react coinbase-wallet 7.0.0
• Uniswap web3-react coinbase-wallet 7.0.1
• Uniswap web3-react coinbase-wallet 7.0.2
• Uniswap web3-react coinbase-wallet 8.0.22
• Uniswap web3-react coinbase-wallet 8.0.23
• Uniswap web3-react coinbase-wallet 8.0.24
• Uniswap web3-react coinbase-wallet 8.0.25

Attack profile CVSS 3.1 · 5.2

Attack vector

Network

Complexity

Low

Privileges needed

High

User interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

Low

Is it in your code?

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