Buttercup allows attackers to obtain the hash of the master password

published 2023-09-07 3 y ago modified 2026-06-17 4 mo ago also GHSA-7cwq-p8cr-h9qg , EUVD-2023-2455

cvss: 5.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

Buttercup v2.20.3 allows attackers to obtain the hash of the master password for the password manager via accessing the file /vaults.json/

Patch / fix

fixed in 1 links 1

npm buttercup 7.4.0

github.com/buttercup/buttercup-core@77fbcdf commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-09-26)

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/tristao-marinho/CVE-2023-41646/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
GitHub	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	buttercup	>=2.20.3, <7.4.0	7.4.0

Classification

Weakness

CWE-916 Use of Password Hash With Insufficient Computational Effort

References

github.com /buttercup/buttercup-core/commit/77fbcdfe4caf57486a3c83c07fc6d36bb0e1d3e1
web
github.com /tristao-marinho/CVE-2023-41646/
exploit, third-party-advisory
buttercup.pw /
product
nvd.nist.gov /vuln/detail/CVE-2023-41646
advisory
github.com /buttercup/buttercup-core/issues/336
web
buttercup.pw
web
github.com /buttercup/buttercup-core
package
github.com /tristao-marinho/CVE-2023-41646
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary