CVE-2025-54885: Thinbus srp The Thinbus Javascript Secure Remote Vulnerability
MODERATECVE-2025-54885 is a MODERATE the thinbus javascript secure remote vulnerability (CWE-331: Insufficient Entropy) affecting Thinbus srp libraries in the npm ecosystem. The issue involves the thinbus javascript secure remote password (srp) client generates fewer bits of entropy than intended. Remediation is available by upgrading affected packages to version 2.0.1.
CVE-2025-54885 at a Glance
How to Fix CVE-2025-54885
To remediate this vulnerability, upgrade all affected Thinbus srp 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 thinbus-srp@2.0.1Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls thinbus-srpHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2025-54885, inspect your project dependencies using npm:
npm ls thinbus-srpAnalyze the terminal output to locate any version of Thinbus srp in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.1), your application is affected.
Note: The npm ls thinbus-srp 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-331: Insufficient Entropy, where the product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others. In Thinbus srp, 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-2025-54885 Affected Thinbus srp Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
thinbus-srp
|
npm |
< 2.0.1
|
2.0.1
|
References
Frequently Asked Questions
What is CVE-2025-54885?
Which Thinbus srp versions are affected?
What version fixes CVE-2025-54885?
Is thinbus-srp affected?
What CWE is associated with CVE-2025-54885?
How can I check npm dependencies for CVE-2025-54885?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-8q6v-474h-whgg",
"modified" : "2025-08-07T15:11:48Z",
"published" : "2025-08-06T17:11:42Z",
"aliases" : [ "CVE-2025-54885" ],
"summary" : "The Thinbus Javascript Secure Remote Password (SRP) Client Generates Fewer Bits of Entropy Than Intended",
"details" : "### Impact\nA protocol compliance bug in thinbus-srp-npm versions prior to 2.0.1 causes the client to generate a fixed 252 bits of entropy instead of the intended bit length of the safe prime (defaulted to 2048 bits). RFC 5054 states in section [2.5.4 Client Key Exchange ](https://datatracker.ietf.org/doc/html/rfc5054#section-2.5.4)\n\n> The client key exchange message carries the client's public value\n (A). The client calculates this value as A = g^a % N, where a is a\n random number that SHOULD be at least 256 bits in length.\n\nThe client public value is being generated from a private value that is 4 bits below the specification. This reduces the protocol's designed security margin it is now practically exploitable. The servers full sized 2048 bit random number is used to create the shared session key and password proof. \n\n### Patches\n\nThe issue is fixed in versions >= 2.0.1\n\n### Workarounds\n\nIt is possible to patch a legacy version: \n\n```javascript\n// WRONG\nvar hexLength = this.toHex(N).length;\n\n// CORRECT \nvar hexLength = this.toHex(this.N()).length;\n```",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "thinbus-srp"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.0.1"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/simbo1905/thinbus-srp-npm/security/advisories/GHSA-8q6v-474h-whgg"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-54885"
}, {
"type" : "WEB",
"url" : "https://github.com/simbo1905/thinbus-srp-npm/issues/28"
}, {
"type" : "WEB",
"url" : "https://github.com/simbo1905/thinbus-srp-npm/pull/30/commits/4aeaea2366e090765a8204059c7bcf3616438d31"
}, {
"type" : "WEB",
"url" : "https://github.com/simbo1905/thinbus-srp-npm/commit/aa7064c1db7294ce867e9bc92f26fa6c71a5a2cb"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/simbo1905/thinbus-srp-npm"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-331" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-08-06T17:11:42Z",
"nvd_published_at" : "2025-08-07T01:15:26Z"
}
}