CVE-2020-13413Network attack vector

Unauthenticated user enumeration via discrepant API responses

Published May 22, 2020 · Updated Aug 4, 2024

User enumeration in Aviatrix Controller before 5.4.1204 allows remote attackers to identify valid accounts through unauthenticated API requests. The API emits distinguishable responses when supplied usernames exist versus when they do not, revealing account validity during repeated guesses. No authentication or user interaction is required; the consequence is limited to valid-username disclosure that supports password brute forcing.

CVSS severity5.3
Medium
EPSS probability1.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

User enumeration in Aviatrix Controller before 5.4.1204 allows remote attackers to identify valid accounts through unauthenticated API requests. The API emits distinguishable responses when supplied usernames exist versus when they do not, revealing account validity during repeated guesses. No authentication or user interaction is required; the consequence is limited to valid-username disclosure that supports password brute forcing.

The record

CVE
CVE-2020-13413
Published
May 22, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-203, CAPEC-189, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 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

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-203Observable Discrepancy
CAPEC-189Black Box Reverse Engineering
T1087Account Discovery

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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