CVE-2021-39919

Account token disclosure via mailer argument logging

Published Dec 13, 2021 · Updated Aug 4, 2024

Information disclosure in affected GitLab CE/EE 14.x releases allows local users with log access to read account tokens. ActiveJob serializes mailer arguments containing reset-password and new-user email tokens into gitlab-rails/production.log instead of suppressing those messages. Access to application logs is required; exposed reset-password tokens enable account takeover, while new-user email tokens disclose invitation secrets.

CVSS severity4.4
Medium
EPSS probability0.29%
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 14.x releases allows local users with log access to read account tokens. ActiveJob serializes mailer arguments containing reset-password and new-user email tokens into gitlab-rails/production.log instead of suppressing those messages. Access to application logs is required; exposed reset-password tokens enable account takeover, while new-user email tokens disclose invitation secrets.

The record

CVE
CVE-2021-39919
Published
Dec 13, 2021
Updated
Aug 4, 2024
Vendor
GitLab
Product
GitLab
Classifications
CWE-640, T1552.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 13, 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=>=14.0, <14.3.6
  2. Affected versionversion=>=14.4, <14.4.4
  3. Affected versionversion=>=14.5, <14.5.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

GitLab · GitLabversion=>=14.0, <14.3.6; version=>=14.4, <14.4.4; version=>=14.5, <14.5.2

Published CVSS scores

2.1NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
4.4GitLab Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-640Weak Password Recovery Mechanism for Forgotten Password
T1552.001Unsecured Credentials: Credentials In Files

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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