What is CVE-2020-22873?

CVE-2020-22873 is a critical-severity vulnerability in Jsish, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-07-13.

How severe is CVE-2020-22873?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Jsish

CVE-2020-22873

Buffer overflow vulnerability in function NumberToPrecisionCmd in jsish before 3.0.7, allows remote attackers to execute arbitrary code.

Vulnerability class: Buffer Overflow

Published 2021-07-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.9% 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

Jsish

Weakness classification (CWE)

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

References

github.com/pcmacdon/jsish/commit/430ea27accd4d4ffddc946c9402e7c9064835a18 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-22873?: CVE-2020-22873 is a critical-severity vulnerability in Jsish, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-07-13.
How severe is CVE-2020-22873?: Critical severity. CVSS v3 base score is 9.8 out of 10.