CVE-2020-4461Network attack vector

Authenticated access-control bypass via unverified token claims

Published May 20, 2020 · Updated Sep 16, 2024

Improper id_token validation in IBM Security Verify Access Appliance 9.0.7.1 allows remote authenticated users to bypass access controls. The id_token processing path accepts attacker-manipulated claims without verifying their authenticity before applying them to access-control decisions. A valid appliance account is required; IBM reports integrity impact only and does not disclose the affected endpoint or claim-processing function.

CVSS severity6.5
Medium
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper id_token validation in IBM Security Verify Access Appliance 9.0.7.1 allows remote authenticated users to bypass access controls. The id_token processing path accepts attacker-manipulated claims without verifying their authenticity before applying them to access-control decisions. A valid appliance account is required; IBM reports integrity impact only and does not disclose the affected endpoint or claim-processing function.

The record

CVE
CVE-2020-4461
Published
May 20, 2020
Updated
Sep 16, 2024
Vendor
IBM
Product
IBM Security Verify Access Appliance
Classifications
T1548
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=9.0.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM Security Verify Access Applianceversion=9.0.7.1

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
6.5IBM CorporationCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:N/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

T1548Abuse Elevation Control Mechanism

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo