CVE-2020-11661Network attack vector

User-data disclosure and modification via access-control bypass

Published Apr 15, 2020 · Updated Aug 4, 2024

Access-control bypass in Broadcom Layer7 API Developer Portal 4.3.1 and earlier allows privileged users to view and edit user data. Broadcom identifies the locus only as the portal's user-data authorization handling and has not published the failed authorization check. A privileged portal account is required; exploitation exposes and permits modification of user records without affecting availability.

CVSS severity8.1
High
EPSS probability1.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access-control bypass in Broadcom Layer7 API Developer Portal 4.3.1 and earlier allows privileged users to view and edit user data. Broadcom identifies the locus only as the portal's user-data authorization handling and has not published the failed authorization check. A privileged portal account is required; exploitation exposes and permits modification of user records without affecting availability.

The record

CVE
CVE-2020-11661
Published
Apr 15, 2020
Updated
Aug 4, 2024
Vendor
Broadcom
Product
Layer7 API Developer Portal
Classifications
T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.3.1 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Broadcom · Layer7 API Developer Portalversion=4.3.1 and earlier

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
5.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1098Account Manipulation

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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