CVE-2021-22249Public exploitNetwork attack vector

Private email disclosure via failed group invitation

Published Aug 23, 2021 · Updated Aug 3, 2024

Information disclosure in GitLab EE allows remote authenticated users to reveal a private email address through a failed group invitation. The email-domain validation in ee/app/models/ee/group_member.rb inserts the invited user's email into an error when the allowlist rejects it. Exploitation requires control of a paid-plan group with domain restrictions and a known target username on GitLab EE 12.2 through 13.12.8, 14.0 through 14.0.6, or 14.1 through 14.1.1.

CVSS severity4.3
Medium
EPSS probability0.97%
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 GitLab EE allows remote authenticated users to reveal a private email address through a failed group invitation. The email-domain validation in ee/app/models/ee/group_member.rb inserts the invited user's email into an error when the allowlist rejects it. Exploitation requires control of a paid-plan group with domain restrictions and a known target username on GitLab EE 12.2 through 13.12.8, 14.0 through 14.0.6, or 14.1 through 14.1.1.

The record

CVE
CVE-2021-22249
Published
Aug 23, 2021
Updated
Aug 3, 2024
Vendor
GitLab
Product
GitLab
Classifications
CWE-209, T1589.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 23, 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=>=12.2, <13.12.9
  2. Affected versionversion=>=14.0, <14.0.7
  3. Affected versionversion=>=14.1, <14.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=>=12.2, <13.12.9; version=>=14.0, <14.0.7; version=>=14.1, <14.1.2

Published CVSS scores

4.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3GitLabCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0NVDAV: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information
T1589.002Gather Victim Identity Information: Email Addresses

Public exploit references

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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