CVE-2020-11663Network attack vector

Open redirect via insecure 404 request handling

Published Apr 15, 2020 · Updated Aug 4, 2024

Open redirect in Broadcom Layer7 API Developer Portal 4.3.1 and earlier allows remote attackers to redirect users via crafted 404 requests. The 404 request handler performs an insecure redirect, but Broadcom has not published the request field or validation failure controlling the destination. Exploitation is unauthenticated over the network but requires a user to follow the crafted link, after which the browser leaves the trusted portal origin.

CVSS severity6.1
Medium
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in Broadcom Layer7 API Developer Portal 4.3.1 and earlier allows remote attackers to redirect users via crafted 404 requests. The 404 request handler performs an insecure redirect, but Broadcom has not published the request field or validation failure controlling the destination. Exploitation is unauthenticated over the network but requires a user to follow the crafted link, after which the browser leaves the trusted portal origin.

The record

CVE
CVE-2020-11663
Published
Apr 15, 2020
Updated
Aug 4, 2024
Vendor
Broadcom
Product
Layer7 API Developer Portal
Classifications
CWE-601
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

Broadcom · Layer7 API Developer Portalversion=4.3.1 and earlier

Published CVSS scores

6.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.8NIST National Vulnerability DatabaseAV:N/AC:M/Au:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')

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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