CVE-2023-1204Public exploitNetwork attack vector

Identity impersonation via reordered email validation

Published May 3, 2023 · Updated Jan 30, 2025

Improper email verification in affected GitLab CE/EE releases before 16.0.2 allows remote authenticated users to impersonate commit identities. User-update logic changes the current email before comparing public and commit email values with it, allowing an unverified attacker-selected address to pass. A low-privileged account and crafted authenticated settings request are required; successful use bypasses commit-email restrictions and misrepresents account identity.

CVSS severity4.3
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper email verification in affected GitLab CE/EE releases before 16.0.2 allows remote authenticated users to impersonate commit identities. User-update logic changes the current email before comparing public and commit email values with it, allowing an unverified attacker-selected address to pass. A low-privileged account and crafted authenticated settings request are required; successful use bypasses commit-email restrictions and misrepresents account identity.

The record

CVE
CVE-2023-1204
Published
May 3, 2023
Updated
Jan 30, 2025
Vendor
GitLab
Product
GitLab
Classifications
CWE-347, T1036
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>=10.0, <12.9.8
  2. Affected versionversion=>=12.10, <12.10.7
  3. Affected versionversion=>=13.0, <13.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=>=10.0, <12.9.8; version=>=12.10, <12.10.7; version=>=13.0, <13.0.1

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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-347Improper Verification of Cryptographic Signature
T1036Masquerading

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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