CVE-2025-55003: Github.com/openbao/openbao OpenBao Login MFA Bypass Of Vulnerability
MODERATECVE-2025-55003 is a MODERATE (CVSS 5.7) openbao login mfa bypass of vulnerability (CWE-307: Improper Restriction of Excessive Authentication Attempts) affecting Github.com/openbao/openbao libraries in the Go ecosystem. The issue involves openbao login mfa bypass of rate limiting and totp token reuse. Remediation is available by upgrading affected packages to version 2.3.2, 0.0.0-20250807113757-8340a6918f6c.
CVE-2025-55003 at a Glance
Security Impact
CVSS: 5.7
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N).
How to Fix CVE-2025-55003
To remediate this vulnerability, upgrade all affected Github.com/openbao/openbao dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/openbao/openbao to 2.3.2Upgrade github.com/openbao/openbao to 0.0.0-20250807113757-8340a6918f6cRun the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/openbao/openbaoHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-55003, inspect your project dependencies for Github.com/openbao/openbao:
inspect dependencies for github.com/openbao/openbaoAnalyze the terminal output to locate any version of Github.com/openbao/openbao in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.3.2), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-307: Improper Restriction of Excessive Authentication Attempts, where the product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame. In Github.com/openbao/openbao, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-55003 Affected Github.com/openbao/openbao Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/openbao/openbao
|
Go |
≥ 0.1.0
< 2.3.2
|
2.3.2
|
|
github.com/openbao/openbao
|
Go |
< 0.0.0-20250807113757-8340a6918f6c
|
0.0.0-20250807113757-8340a6918f6c
|
References
Frequently Asked Questions
What is CVE-2025-55003?
Which Github.com/openbao/openbao versions are affected?
What version fixes CVE-2025-55003?
Is github.com/openbao/openbao affected?
What is the CVSS score of CVE-2025-55003?
What CWE is associated with CVE-2025-55003?
How can I check Go dependencies for CVE-2025-55003?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-rxp7-9q75-vj3p",
"modified" : "2025-08-11T13:56:53Z",
"published" : "2025-08-08T14:44:49Z",
"aliases" : [ "CVE-2025-55003" ],
"summary" : "OpenBao Login MFA Bypass of Rate Limiting and TOTP Token Reuse",
"details" : "### Impact\n\nOpenBao's Login Multi-Factor Authentication (MFA) system allows enforcing MFA using Time-based One Time Password (TOTP). Due to normalization applied by the underlying TOTP library, codes were accepted which could contain whitespace; this whitespace could bypass internal rate limiting of the MFA method and allow reuse of existing MFA codes.\n\n### Patches\n\nOpenBao v2.3.2 will patch this issue.\n\n### Workarounds\n\nUse of rate-limiting quotas can limit an attacker's ability to exploit this: https://openbao.org/api-docs/system/rate-limit-quotas/\n\n### References\n\nThis issue was disclosed to HashiCorp and is the OpenBao equivalent of the following tickets:\n\n- https://discuss.hashicorp.com/t/hcsec-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038\n- https://nvd.nist.gov/vuln/detail/CVE-2025-6015",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/openbao/openbao"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0.1.0"
}, {
"fixed" : "2.3.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/openbao/openbao"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.0.0-20250807113757-8340a6918f6c"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/openbao/openbao/security/advisories/GHSA-rxp7-9q75-vj3p"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-55003"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-6015"
}, {
"type" : "WEB",
"url" : "https://github.com/openbao/openbao/commit/8340a6918f6c41d8f75b6c3845c376d9dc32ed19"
}, {
"type" : "WEB",
"url" : "https://discuss.hashicorp.com/t/hcsec-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/openbao/openbao"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-307" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-08-08T14:44:49Z",
"nvd_published_at" : "2025-08-09T03:15:47Z"
}
}