Vulnerabilities in pkg:npm/@backstage/plugin-permission-backend
PACKAGECVE-2025-32791 is a MODERATE (CVSS 4.3) permission policy information leakage vulnerability (CWE-213: Exposure of Sensitive Information Due to Incompatible Policies) affecting @backstage/plugin permission backend libraries in the npm ecosystem. The issue involves permission policy information leakage in backstage permission system. Remediation is available by upgrading affected packages to version 0.6.0.
pkg:npm/@backstage/plugin-permission-backend
Vulnerability advisories affecting package pkg:npm/@backstage/plugin-permission-backend. Select an advisory below to view technical details or fixes.
| Advisory ID | CVE / NVD | Severity | Summary |
|---|---|---|---|
| GHSA-f8j4-p5cr-p777 | CVE-2025-32791 | MODERATE | Permission policy information leakage in Backstage permission system |
CVE-2025-32791 at a Glance
Security Impact
CVSS: 4.3
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:N/S:U/C:L/I:N/A:N).
How to Fix CVE-2025-32791
To remediate this vulnerability, upgrade all affected @backstage/plugin permission backend dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
npm install @backstage/plugin-permission-backend@0.6.0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls @backstage/plugin-permission-backendHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2025-32791, inspect your project dependencies using npm:
npm ls @backstage/plugin-permission-backendAnalyze the terminal output to locate any version of @backstage/plugin permission backend in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.6.0), your application is affected.
Note: The npm ls @backstage/plugin-permission-backend command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-213: Exposure of Sensitive Information Due to Incompatible Policies, where the product's intended functionality exposes information to certain actors in accordance with the developer's security policy, but this information is regarded as sensitive according to the intended security policies of other stakeholders such as the product's administrator, users, or others whose information is being processed. In @backstage/plugin permission backend, 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-2025-32791 Affected @backstage/plugin permission backend Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
@backstage/plugin-permission-backend
|
npm |
< 0.6.0
|
0.6.0
|
References
Frequently Asked Questions
What is CVE-2025-32791?
Which @backstage/plugin permission backend versions are affected?
What version fixes CVE-2025-32791?
Is @backstage/plugin-permission-backend affected?
What is the CVSS score of CVE-2025-32791?
What CWE is associated with CVE-2025-32791?
How can I check npm dependencies for CVE-2025-32791?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-f8j4-p5cr-p777",
"modified" : "2025-04-17T12:39:25Z",
"published" : "2025-04-16T15:34:21Z",
"aliases" : [ "CVE-2025-32791" ],
"summary" : "Permission policy information leakage in Backstage permission system",
"details" : "### Impact\n\nA vulnerability in the Backstage permission plugin backend allows callers to extract some information about the conditional decisions returned by the permission policy installed in the permission backend. If the permission system is not in use or if the installed permission policy does not use conditional decisions, there is no impact.\n\n### Patches\n\nThis issue has been resolved in version `0.6.0` of the permissions backend.\n\n### Workarounds\n\nAdministrators of the permission policies can ensure that they are crafted in such a way that conditional decisions do not contain any sensitive information.\n\n### References\n\nIf you have any questions or comments about this advisory:\n\nOpen an issue in the [Backstage repository](https://github.com/backstage/backstage)\nVisit our Discord, linked to in [Backstage README](https://github.com/backstage/backstage)",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "@backstage/plugin-permission-backend"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.6.0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/backstage/backstage/security/advisories/GHSA-f8j4-p5cr-p777"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-32791"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/backstage/backstage"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-213" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-04-16T15:34:21Z",
"nvd_published_at" : "2025-04-16T22:15:14Z"
}
}