What is CVE-2021-45807?

CVE-2021-45807 is a critical-severity vulnerability in Jpress. CVSS score: 9.8/10. Published 2022-01-13.

How severe is CVE-2021-45807?

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

Vulnerability in Jpress

CVE-2021-45807

jpress v4.2.0 is vulnerable to command execution via io.jpress.web.admin._AddonController::doUploadAndInstall.

Published 2022-01-13 · last modified 2026-07-09.

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: 0.021 (81.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Jpress — versions 4.2.0

References

af854a3a-2127-422b-91ae-364da2661108 (Product)
github.com/JPressProjects/jpress (Product, Third Party Advisory)
github.com/JPressProjects/jpress/issues/167 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-45807?: CVE-2021-45807 is a critical-severity vulnerability in Jpress. CVSS score: 9.8/10. Published 2022-01-13.
How severe is CVE-2021-45807?: Critical severity. CVSS v3 base score is 9.8 out of 10.