CVE-2021-29245

Medium

Published: 05 May 2021

Published

05 May 2021

Modified

21 November 2024

KEV Added

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Patch

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CVSS Score v3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Score 0.0036 58.8th percentile

Risk Priority 11 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-29245 is a medium-severity PRNG (CWE-338) vulnerability in Btcpayserver Btcpay Server. Its CVSS base score is 5.3 (Medium).

Operationally, ranked in the top 41.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

BTCPay Server through 1.0.7.0 uses a weak method Next to produce pseudo-random values to generate a legacy API key.

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

btcpayserver

btcpay server

≤ 1.0.7.0

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-338

Security associations share details on cryptographically weak PRNGs, helping avoid their implementation in security-critical functions.

addresses: CWE-338

Cryptographic key management standards require cryptographically strong PRNGs for key material, blocking use of weak generators.