CVE-2023-45140Public exploitNetwork attack vector

Authenticated JIT MFA bypass via SCP and SFTP

Published Nov 8, 2023 · Updated Sep 12, 2024

Authentication bypass in OVHcloud The Bastion 3.0.0 through 3.14.0 allows remote authenticated users to skip JIT MFA for SCP or SFTP. The SCP and SFTP plugin paths start permitted file-transfer sessions without invoking the group- or account-based JIT MFA enforcement applied to normal SSH access. An existing bastion account must have the relevant group or personal access and SCP or SFTP permission; the bypass permits authorized transfers without the required additional factor.

CVSS severity4.8
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in OVHcloud The Bastion 3.0.0 through 3.14.0 allows remote authenticated users to skip JIT MFA for SCP or SFTP. The SCP and SFTP plugin paths start permitted file-transfer sessions without invoking the group- or account-based JIT MFA enforcement applied to normal SSH access. An existing bastion account must have the relevant group or personal access and SCP or SFTP permission; the bypass permits authorized transfers without the required additional factor.

The record

CVE
CVE-2023-45140
Published
Nov 8, 2023
Updated
Sep 12, 2024
Vendor
OVHcloud
Product
The Bastion
Classifications
CWE-288, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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=>= 3.0.0, <= 3.14.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OVHcloud · The Bastionversion=>= 3.0.0, <= 3.14.0

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
4.8GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/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-288Authentication Bypass Using an Alternate Path or Channel
T1078Valid Accounts

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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