CVE-2025-13357Network attack vector

Authentication bypass via insecure LDAP default

Published Nov 21, 2025 · Updated Nov 21, 2025

Authentication bypass in HashiCorp Vault Terraform Provider 4.2.0 through 5.4.0 allows remote attackers to gain Vault access via LDAP. The vault_ldap_auth_backend resource writes deny_null_bind=false when the setting is omitted, overriding Vault's secure API default. Exploitation requires a provider-created LDAP backend without an explicit setting and an LDAP server that accepts anonymous or unauthenticated binds.

CVSS severity7.4
High
EPSS probability0.53%
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 HashiCorp Vault Terraform Provider 4.2.0 through 5.4.0 allows remote attackers to gain Vault access via LDAP. The vault_ldap_auth_backend resource writes deny_null_bind=false when the setting is omitted, overriding Vault's secure API default. Exploitation requires a provider-created LDAP backend without an explicit setting and an LDAP server that accepts anonymous or unauthenticated binds.

The record

CVE
CVE-2025-13357
Published
Nov 21, 2025
Updated
Nov 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1188
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 2025Record 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

7.4GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1188Initialization of a Resource with an Insecure Default

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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