CVE-2019-15585Network attack vector

Account takeover via SAML validation bypass

Published Jan 28, 2020 · Updated Aug 5, 2024

Improper authentication in GitLab CE/EE before 12.3.2 allows remote attackers to take over another user's account via SAML login. The GitLab SAML integration performs insufficient validation of authentication data, allowing the authentication check to be bypassed. Exploitation requires SAML-based sign-on to be enabled and network access to the GitLab instance; successful exploitation compromises the targeted account.

CVSS severity9.8
Critical
EPSS probability1.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in GitLab CE/EE before 12.3.2 allows remote attackers to take over another user's account via SAML login. The GitLab SAML integration performs insufficient validation of authentication data, allowing the authentication check to be bypassed. Exploitation requires SAML-based sign-on to be enabled and network access to the GitLab instance; successful exploitation compromises the targeted account.

The record

CVE
CVE-2019-15585
Published
Jan 28, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NVDAV:N/AC:L/Au:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

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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