What is CVE-2020-12427?

CVE-2020-12427 is a high-severity vulnerability in Apple macOS, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2020-05-13.

How severe is CVE-2020-12427?

High severity. CVSS v3 base score is 8.8 out of 10.

CSRF in Apple macOS

CVE-2020-12427

The Western Digital WD Discovery application before 3.8.229 for MyCloud Home on Windows and macOS is vulnerable to CSRF, with impacts such as stealing data, modifying disk contents, or exhausting disk space.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2020-05-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

support.wdc.com/downloads.aspx (Vendor Advisory)
www.westerndigital.com/support/productsecurity/wdc-20004-wd-discovery-cross-sit… (Vendor Advisory)

Frequently asked questions

What is CVE-2020-12427?: CVE-2020-12427 is a high-severity vulnerability in Apple macOS, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2020-05-13.
How severe is CVE-2020-12427?: High severity. CVSS v3 base score is 8.8 out of 10.