CVE-2020-11586Network attack vector

External entity injection via malicious API DTD

Published Apr 6, 2020 · Updated Aug 4, 2024

XXE in CIPPlanner CIPAce 9.1 Build 2019092801 allows remote attackers to submit malicious XML DTD data through an unauthenticated API. The API's XML parser accepts attacker-controlled DTD declarations and resolves external entities instead of rejecting them. Public records do not identify the affected endpoint or state whether exploitation reads server files, initiates server-side requests, or interrupts service.

CVSS severity9.8
Critical
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in CIPPlanner CIPAce 9.1 Build 2019092801 allows remote attackers to submit malicious XML DTD data through an unauthenticated API. The API's XML parser accepts attacker-controlled DTD declarations and resolves external entities instead of rejecting them. Public records do not identify the affected endpoint or state whether exploitation reads server files, initiates server-side requests, or interrupts service.

The record

CVE
CVE-2020-11586
Published
Apr 6, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-611, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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