What is CVE-2020-11598?

CVE-2020-11598 is a critical-severity vulnerability in Cipplanner Cipace, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2020-04-06.

How severe is CVE-2020-11598?

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

Auth bypass in Cipplanner Cipace

CVE-2020-11598

An issue was discovered in CIPPlanner CIPAce 9.1 Build 2019092801. Upload.ashx allows remote attackers to execute arbitrary code by uploading and executing an ASHX file.

Vulnerability class: Broken Authentication

Published 2020-04-06 · 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: 0.025 (84.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Cipplanner Cipace

Weakness classification (CWE)

References

www.criticalstart.com/vulnerabilities-discovered-in-cipace-enterprise-platform/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-11598?: CVE-2020-11598 is a critical-severity vulnerability in Cipplanner Cipace, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2020-04-06.
How severe is CVE-2020-11598?: Critical severity. CVSS v3 base score is 9.8 out of 10.