CVE-2023-40580Network attack vector

Mnemonic disclosure via passwordless private API request

Published Aug 25, 2023 · Updated Aug 2, 2024

Information disclosure in Freighter before 5.3.1 allows remote attackers to read an unlocked wallet's mnemonic via a malicious website. The popup message listener's getMnemonicPhrase handler returned the stored mnemonic without requiring the wallet password. A user must visit attacker-controlled content while Freighter is unlocked; disclosure of the recovery phrase exposes control of the wallet's keys and funds.

CVSS severity8.1
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Freighter before 5.3.1 allows remote attackers to read an unlocked wallet's mnemonic via a malicious website. The popup message listener's getMnemonicPhrase handler returned the stored mnemonic without requiring the wallet password. A user must visit attacker-controlled content while Freighter is unlocked; disclosure of the recovery phrase exposes control of the wallet's keys and funds.

The record

CVE
CVE-2023-40580
Published
Aug 25, 2023
Updated
Aug 2, 2024
Vendor
Stellar Development Foundation
Product
Freighter
Classifications
CWE-200, T1555
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 5.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Stellar Development Foundation · Freighterversion=< 5.3.1

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1555Credentials from Password Stores

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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