PrestaShop ps_facetedsearch is a module that adds layered navigation filters. From 3.0.0 until 4.0.4, the ps_facetedsearch module rebuilds selected search filters from the request URL, and the value of a slider filter, price or weight, is taken from the URL without sufficient validation and stored in an internal filter-block cache where it is serialized and later read back with a raw native unserialize() in src/Filters/Block.php. By crafting that value, an unauthenticated attacker can smuggle a malicious serialized PHP object into the cache, and when it is deserialized, a gadget chain writes an arbitrary PHP file inside the modules/ps_faceted
PrestaShop module ps_facetedsearch might be vulnerable from CVE-2017-9841
### Impact
We have identified that some ps_facetedsearch module ZIP archives have been built with phpunit dev dependencies. PHPUnit contains a php script that would allow, on a webserver, an attacker to perform a RCE.
This vulnerability impacts
- phpunit before 4.8.28 and 5.x before 5.6.3 as reported in [CVE-2017-9841](https://nvd.nist.gov/vuln/detail/CVE-2017-9841)
- phpunit >= 5.63 before 7.5.19 and 8.5.1 (this is a newly found vulnerability that is currently being submitted as a CVE after disclosure was provided to phpunit maintainers)
### Patches
In the [security patch](https://github.com/PrestaShop/ps_facetedsearch/releases/tag/v3.4.