What is CVE-2023-40580?

CVE-2023-40580 is a high-severity vulnerability in Stellar Freighter, classified under Information Disclosure. CVSS score: 8.1/10. Published 2023-08-25.

How severe is CVE-2023-40580?

High severity. CVSS v3 base score is 8.1 out of 10.

Information disclosure in Stellar Freighter

CVE-2023-40580

Freighter is a Stellar chrome extension. It may be possible for a malicious website to access the recovery mnemonic phrase when the Freighter wallet is unlocked. This vulnerability impacts access control to the mnemonic recovery phrase. This issue was patched in version 5.3.1.

Vulnerability class: Information Disclosure

Published 2023-08-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Stellar Freighter — versions < 5.3.1

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

github.com/stellar/freighter/security/advisories/GHSA-vqr6-hwg2-775w (Patch, Third Party Advisory)
github.com/stellar/freighter/pull/948 (Patch)
github.com/stellar/freighter/commit/81f78ba008c41ce631a3d0f9e4449f4bbd90baee (Patch)

Frequently asked questions

What is CVE-2023-40580?: CVE-2023-40580 is a high-severity vulnerability in Stellar Freighter, classified under Information Disclosure. CVSS score: 8.1/10. Published 2023-08-25.
How severe is CVE-2023-40580?: High severity. CVSS v3 base score is 8.1 out of 10.