CVE-2021-22236Network attack vector

OAuth token misissuance via incorrect client selection

Published Aug 25, 2021 · Updated Aug 3, 2024

Incorrect authorization in GitLab CE/EE 14.1.0 through 14.1.1 allows remote authenticated users to receive misissued OAuth tokens. The subscription-creation path mishandles OAuth client identifiers and generates each new subscription token for the wrong OAuth client application. Exploitation requires low-privileged network access and user interaction; the public vendor record does not identify the affected endpoint or further bound token capabilities.

CVSS severity5.4
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 GitLab CE/EE 14.1.0 through 14.1.1 allows remote authenticated users to receive misissued OAuth tokens. The subscription-creation path mishandles OAuth client identifiers and generates each new subscription token for the wrong OAuth client application. Exploitation requires low-privileged network access and user interaction; the public vendor record does not identify the affected endpoint or further bound token capabilities.

The record

CVE
CVE-2021-22236
Published
Aug 25, 2021
Updated
Aug 3, 2024
Vendor
GitLab
Product
GitLab
Classifications
CWE-863
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=>=14.1, <14.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=>=14.1, <14.1.2

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.4GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
6.5NVDAV: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

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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