CVE-2018-16459 Cross-Site Scripting in exceljs
An attacker can inject malicious scripts into Excel cell values that execute when the worksheet is viewed in a browser.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-16459?
CVE-2018-16459 is a medium-severity cross-site scripting vulnerability in https://github.com/guyonroche exceljs, published on 6 Sep 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An unescaped payload in exceljs <v1.6 allows a possible XSS via cell value when worksheet is displayed in browser.
Weakness: CWE-79
Which versions are affected by CVE-2018-16459?
2 open source packages ship an affected version, including exceljs. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
exceljs npm | All versions | 1.6.0 |
exceljs npm | All versions | 1.6.0 |
Products include Exceljs Project Exceljs.
How do I fix CVE-2018-16459?
Upgrade exceljs to 1.6.0 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2018-16459 being exploited?
There is no known exploitation of CVE-2018-16459 in the wild and no public exploit code.
Sources
Also known as GHSA-2j2j-8rrv-264g.