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Api Manager CVE-2020-24589

CRITICAL
Improper Restriction of XML External Entity Reference (CWE-611)
2020-08-21 cve@mitre.org
XXE Api Manager Api Microgateway Wso2
9.1
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-611
OWASP Top 10:2025
A02:2025 - Security Misconfiguration
ASVS 5.0
V13 - Configuration XML external entity prevention
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

CVSS score of 9.1 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived

A remote attacker could read arbitrary files or perform SSRF through XML processing by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.
Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.
Patch available 26.9% exploitation probability (EPSS)

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AnalysisAI

The Management Console in WSO2 API Manager through 3.1.0 and API Microgateway 2.2.0 allows XML External Entity injection (XXE) attacks. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This XML External Entity (XXE) vulnerability could allow attackers to read arbitrary files or perform SSRF through XML processing.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Disable external entity processing in XML parsers, use JSON instead of XML where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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Technical ContextAI · show details

This vulnerability is classified as XML External Entity (XXE) (CWE-611), which allows attackers to read arbitrary files or perform SSRF through XML processing. The Management Console in WSO2 API Manager through 3.1.0 and API Microgateway 2.2.0 allows XML External Entity injection (XXE) attacks. Affected products include: Wso2 Api Manager, Wso2 Api Microgateway. Version information: through 3.1.0.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 9.1 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

DescriptionNVD

The Management Console in WSO2 API Manager through 3.1.0 and API Microgateway 2.2.0 allows XML External Entity injection (XXE) attacks.

Threat Intelligence Overview

EPSS Score
26.9%
Top 2% exploitable
Exploit
POC
Public exploit code exists
Data Quality
2 sources
Confidence: Low
NVD CVE.org EPSS POC (1)

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC Yes
EPSS 26.9%
Patch available Yes
Active threat Yes
Deciding rule
CRITICAL severity + public POC available
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

93
Low Medium High Critical
KEV: 0
EPSS: +27
CVSS: +46
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

XML External Entity Injection HIGH

XML External Entity (XXE) attacks exploit XML parsers that process Document Type Definitions (DTDs) without proper restrictions.

Affected Products (CPE)NVD

cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:api_microgateway:2.2.0:*:*:*:*:*:*:*

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Same weakness CWE-611 – Improper Restriction of XML External Entity Reference

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Same technique XXE

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References

Advisories & patches
PATCH https://docs.wso2.com/display/Security/Security+Advisory+WSO2-2020-0742

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