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Fencer Vulns
medium 6.5

CVE-2025-55001 json

OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias

published 2025-08-08 15 mo ago modified 2026-09-08 2 mo ago also BIT-openbao-2025-55001 , EUVD-2025-24033 , GHSA-2q8q-8fgw-9p6p , GO-2025-3859

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets, certificates, and keys. In versions 2.3.1 and below, OpenBao allowed the assignment of policies and MFA attribution based upon entity aliases, chosen by the underlying auth method. When the username_as_alias=true parameter in the LDAP auth method was in use, the caller-supplied username was used verbatim without normalization, allowing an attacker to bypass alias-specific MFA requirements. This issue was fixed in version 2.3.2. To work around this, remove all usage of the username_as_alias=true parameter and update any entity aliases accordingly.

Patch / fix

  • go github.com/openbao/openbao 0.0.0-20250807212521-c52795c1ef74, 2.3.2
  • bitnami openbao 0.0.0-20250807212521-c52795c1ef74, 2.3.2
  • openbao openbao 0.0.0-20250807212521-c52795c1ef74, 2.3.2
  • govulncheck-vulndb SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 0.0.20250814T182633-150000.1.98.1

suse advisories SUSE-SU-2025:02912-1

  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250811T192933-1.1

opensuse advisories openSUSE-SU-2025:15434-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
14 mo ago

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
go github.com/openbao/openbao
>=0.1.0, <2.3.2
<0.0.0-20250807212521-c52795c1ef74
>=0.1.0
2.3.2
0.0.0-20250807212521-c52795c1ef74
bitnami openbao
<0.0.0-20250807212521-c52795c1ef74
>=0.0.1, <2.3.2
0.0.0-20250807212521-c52795c1ef74
2.3.2

Affected products

  • openbao openbao

Classification

Weakness
  • CWE-156 Improper Neutralization of Whitespace

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.