Auth bypass in Bitcoin Core

CVE-2024-52921

In Bitcoin Core before 25.0, a peer can affect the download state of other peers by sending a mutated block.

Vulnerability class: Broken Access Control

EPSS: 0.004 (35.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Bitcoin Bitcoin_core
N/a — versions n/a

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

cve@mitre.org (Third Party Advisory)
cve@mitre.org (Vendor Advisory)

Frequently asked questions

What is CVE-2024-52921?: CVE-2024-52921 is a medium-severity vulnerability in Bitcoin Core, classified under Missing Authorization. CVSS score: 5.3/10. Published 2024-11-18.
How severe is CVE-2024-52921?: Medium severity. CVSS v3 base score is 5.3 out of 10.