CVE-2021-39901Network attack vector

Group SCIM token disclosure via persistent display

Published Nov 4, 2021 · Updated Aug 4, 2024

Information disclosure in affected GitLab CE/EE releases allows remote authenticated users with group Owner access to read a group SCIM token. The group SCIM configuration view renders the existing token after generation or reset instead of withholding the stored secret. Exploitation requires Owner permission in a SCIM-enabled group, and the disclosed token grants access to that group's SCIM API.

CVSS severity2.7
Low
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in affected GitLab CE/EE releases allows remote authenticated users with group Owner access to read a group SCIM token. The group SCIM configuration view renders the existing token after generation or reset instead of withholding the stored secret. Exploitation requires Owner permission in a SCIM-enabled group, and the disclosed token grants access to that group's SCIM API.

The record

CVE
CVE-2021-39901
Published
Nov 4, 2021
Updated
Aug 4, 2024
Vendor
GitLab
Product
GitLab
Classifications
CWE-200, T1528
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 4, 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=>=11.10, <14.2.6
  2. Affected versionversion=>=14.3, <14.3.4
  3. Affected versionversion=>=14.4, <14.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

GitLab · GitLabversion=>=11.10, <14.2.6; version=>=14.3, <14.3.4; version=>=14.4, <14.4.1

Published CVSS scores

2.7GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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