Vulnerability Description
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_facetedsearch/ directory, which is then used as a webshell to run commands on the server. This issue is fixed in version 4.0.4.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/PrestaShop/ps_facetedsearch/commit/9ca839fac68a60641d8187a3ff
- https://github.com/PrestaShop/ps_facetedsearch/releases/tag/v4.0.4
- https://github.com/PrestaShop/ps_facetedsearch/security/advisories/GHSA-m5f5-28q
FAQ
What is CVE-2026-54159?
CVE-2026-54159 is a vulnerability with a CVSS score of 10.0 (CRITICAL). 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 o...
How severe is CVE-2026-54159?
CVE-2026-54159 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-54159?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.