CVE-2025-48939
tarteaucitron.js vulnerable to DOM Clobbering via document.currentScript
Description
A vulnerability was identified in tarteaucitron.js where document.currentScript was accessed without verifying that it referenced an actual `<script>` element. If an attacker injected an HTML element such as: ``` <img name="currentScript" src="https://malicious.example.com"> ``` it could clobber the document.currentScript property. This causes the script to resolve incorrectly to an <img> element instead of the <script> tag, leading to unexpected behavior or failure to load the script path correctly. This issue arises because in some browser environments, named DOM elements (e.g., name="currentScript") become properties on the global document object. ## Impact An attacker with control over the HTML could exploit this to change the CDN domain of tarteaucitron. ## Fix https://github.com/AmauriC/tarteaucitron.js/commit/230a3b69d363837acfa895823d841e0608826ba3 The issue was resolved by verifying that document.currentScript is an instance of HTMLScriptElement. If not, the script now falls back safely to the last <script> tag on the page.
How to fix CVE-2025-48939
To remediate CVE-2025-48939, upgrade the affected package to a fixed version below.
- —upgrade to 1.22.0 or later
Is CVE-2025-48939 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.22.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:N/I:L/A:L |