CVE-2021-4201Network attack vector

Unauthenticated hijacking of active sessions

Published Feb 14, 2022 · Updated Apr 14, 2025

Improper access control in Open Identity Platform OpenAM before 6.5.4 or 7.1.1 allows remote attackers to hijack active sessions. The vendor has not publicly identified the affected endpoint or explained which missing access-control check exposes a victim's session. Exploitation requires no privileges but, under the vendor assessment, requires user interaction; a captured administrator session grants that account's authority.

CVSS severity9.6
Critical
EPSS probability1.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Open Identity Platform OpenAM before 6.5.4 or 7.1.1 allows remote attackers to hijack active sessions. The vendor has not publicly identified the affected endpoint or explained which missing access-control check exposes a victim's session. Exploitation requires no privileges but, under the vendor assessment, requires user interaction; a captured administrator session grants that account's authority.

The record

CVE
CVE-2021-4201
Published
Feb 14, 2022
Updated
Apr 14, 2025
Vendor
Open Identity Platform
Product
OpenAM
Classifications
CWE-287, CWE-284, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 2025Record 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=6.5 <6.5.4
  2. Affected versionversion=7.1 <7.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Identity Platform · OpenAMversion=6.5 <6.5.4; version=7.1 <7.1.1

Published CVSS scores

9.6ForgeRock, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NISTAV:N/AC:L/Au:N/C:P/I:P/A:P

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-287Improper Authentication
CWE-284Improper Access Control
T1550.004Use Alternate Authentication Material: Web Session Cookie

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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