medium6.1
CVE-2016-10547
Cross-Site Scripting in nunjucks
Impact
Affected versions of `nunjucks` do not properly escape specially structured user input in template vars when in auto-escape mode, resulting in a cross-site scripting vulnerability. ## Proof of Concept By using an array for the keys in a template var, escaping is bypassed. ```javascript name[]=<script>alert(1)</script> ``` A full PoC is available in the references section. ## Recommendation Update to version 2.4.3 or later.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | nunjucks | < 2.4.3 | 2.4.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mozilla | Nunjucks | through 2.4.2 |