CVE-2021-41230Network attack vector

Incorrect authorization via skipped user-record refresh

Published Nov 5, 2021 · Updated Aug 4, 2024

Incorrect authorization in Pomerium 0.14.0 through 0.15.5 allows remote authenticated users to retain access via stale OIDC claims. The identity manager's onUpdateRecords path decoded updated user records but failed to call onUpdateUser, leaving policy evaluation tied to earlier IdP claims. Exposure requires an allowed_idp_claims policy and a post-login claim change; access can persist after the IdP removes a qualifying claim.

CVSS severity5.3
Medium
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Pomerium 0.14.0 through 0.15.5 allows remote authenticated users to retain access via stale OIDC claims. The identity manager's onUpdateRecords path decoded updated user records but failed to call onUpdateUser, leaving policy evaluation tied to earlier IdP claims. Exposure requires an allowed_idp_claims policy and a post-login claim change; access can persist after the IdP removes a qualifying claim.

The record

CVE
CVE-2021-41230
Published
Nov 5, 2021
Updated
Aug 4, 2024
Vendor
Pomerium
Product
Pomerium
Classifications
CWE-863, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 5, 2021CVE 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=>= 0.14.0, < 0.15.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Pomerium · Pomeriumversion=>= 0.14.0, < 0.15.6

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.3GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
6.5NIST NVDAV:N/AC:L/Au:S/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1078Valid Accounts

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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