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CVE-2021-4201

Pre-authentication session hijacking

Description

Missing access control in ForgeRock Access Management 7.1.0 and earlier versions on all platforms allows remote unauthenticated attackers to hijack sessions, including potentially admin-level sessions. This issue affects: ForgeRock Access Management 7.1 versions prior to 7.1.1; 6.5 versions prior to 6.5.4; all previous versions.

Timeline

  1. ID reserved

    By ForgeRock

  2. · 39 days later

    Published

  3. · 3 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2021-4201, by who scored it
Scored byCVSSScoreVector
ForgeRockCNA (assigner)3.1Critical9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
NVDNVD · Modified3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
2.0% · top 19% of all CVEs (12 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.6.

Affected products

What to do

Solution: This issue is fixed in AM 6.5.4, 7.1.1, and all later versions.

Workaround: Block access to the following endpoints: /authservice /sessionservice /profileservice /policyservice /namingservice /loggingservice

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .