CVE-2025-48939 is a medium-severity (CVSS 4.2) CWE-138 vulnerability in tarteaucitronjs. A fix is available for tarteaucitronjs — see the affected versions and patch details below.
tarteaucitron.js vulnerable to DOM Clobbering via document.currentScript
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-48939.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
tarteaucitronjsnpmDescription
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | tarteaucitronjs | all versions | 1.22.0npm install tarteaucitronjs@1.22.0 |
Affected Products
tarteaucitronjsamauriDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for tarteaucitronjs, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update tarteaucitronjs to 1.22.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-48939 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is CVE-2025-48939 in your dependencies?
Find it across npm, including transitive dependencies.