What is CVE-2020-8215?

CVE-2020-8215 is a high-severity vulnerability in Automattic Canvas, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2020-07-20.

How severe is CVE-2020-8215?

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

Buffer overflow in Automattic Canvas

CVE-2020-8215

A buffer overflow is present in canvas version <= 1.6.9, which could lead to a Denial of Service or execution of arbitrary code when it processes a user-provided image.

Vulnerability class: Buffer Overflow

Published 2020-07-20 · 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: 0.023 (82.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Automattic Canvas
Node-Canvas — versions Not Fixed

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

hackerone.com/reports/315037 (Third Party Advisory)

Frequently asked questions

What is CVE-2020-8215?: CVE-2020-8215 is a high-severity vulnerability in Automattic Canvas, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2020-07-20.
How severe is CVE-2020-8215?: High severity. CVSS v3 base score is 8.8 out of 10.