What is CVE-2020-11586?

CVE-2020-11586 is a critical-severity vulnerability in Cipplanner Cipace, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2020-04-06.

How severe is CVE-2020-11586?

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

XXE in Cipplanner Cipace

CVE-2020-11586

An XXE issue was discovered in CIPPlanner CIPAce 9.1 Build 2019092801. An unauthenticated attacker can make an API request that contains malicious XML DTD data.

Vulnerability class: XXE (XML External Entity)

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: 0.012 (68.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Cipplanner Cipace

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

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

Frequently asked questions

What is CVE-2020-11586?: CVE-2020-11586 is a critical-severity vulnerability in Cipplanner Cipace, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2020-04-06.
How severe is CVE-2020-11586?: Critical severity. CVSS v3 base score is 9.8 out of 10.