{"id":"CVE-2026-54159","aliases":["EUVD-2026-45327","GHSA-m5f5-28qr-9g9r"],"status":"published","title":"ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE","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.","severity":{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0075,"percentile":0.55287,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-74"],"published":"2026-07-10T20:36:56Z","modified":"2026-10-28T02:30:49Z","fixes":[{"ecosystem":"Packagist","package":"prestashop/ps_facetedsearch","fixed_in":["4.0.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"prestashop/ps_facetedsearch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"4.0.4"}]}]},{"source":"osv","ecosystem":"Packagist","package":"prestashop/ps_facetedsearch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"4.0.4"}]}],"versions":["v3.0.0","v3.0.1","v3.0.2","v3.0.3","v3.0.4","v3.0.5","v3.0.6","v3.0.7","v3.1.0","v3.10.0","v3.11.0","v3.11.1","v3.12.0","v3.12.1","v3.13.0","v3.13.1","v3.13.2","v3.14.0","v3.14.1","v3.15.0","v3.15.1","v3.16.0","v3.16.1","v3.2.0","v3.2.1","v3.3.0","v3.4.0","v3.4.1","v3.5.0","v3.6.0","v3.7.0","v3.7.1","v3.8.0","v3.9.0","v4.0.0","v4.0.1","v4.0.2","v4.0.3"]}],"products":[{"vendor":"prestashop","product":"ps_facetedsearch"}],"references":[{"url":"https://github.com/PrestaShop/ps_facetedsearch/security/advisories/GHSA-m5f5-28qr-9g9r","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/PrestaShop/ps_facetedsearch/commit/9ca839fac68a60641d8187a3ff9730ab09af33cb","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/PrestaShop/ps_facetedsearch/releases/tag/v4.0.4","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/advisories/GHSA-m5f5-28qr-9g9r"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54159.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54159","tags":["advisory"]},{"url":"https://github.com/PrestaShop/ps_facetedsearch","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-54159","title":"ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE","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.","status":"published","published":"2026-07-17T20:39:25.838Z","modified":"2026-07-20T13:56:07.4Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T13:38:09.774038Z"}],"euvd":[{"id":"EUVD-2026-45327","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.","status":"published","published":"2026-07-17T20:39:25Z","modified":"2026-07-20T13:56:07Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:19:49.035342Z"}],"ghsa":[{"id":"GHSA-m5f5-28qr-9g9r","title":"prestashop/ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE","description":"### Impact\n\nA PHP Object Injection vulnerability affects the PrestaShop module `ps_facetedsearch`.\n\nThe module rebuilds the selected search filters from the request URL. The value of a slider filter (**price** or **weight**) is taken from the URL without sufficient validation, then stored in an internal filter-block cache where it is serialized and later read back with a raw native `unserialize()`.\nBy crafting that value, an attacker can smuggle a malicious serialized PHP object into the cache. When it is deserialized, a gadget chain writes an arbitrary PHP file inside the module directory, which is then used as a webshell to run commands on the server.\n\n### Who is impacted\n\nAny shop using a vulnerable version of `ps_facetedsearch` that displays a filter template containing a slider filter (price or weight). Exploitation is remote and **unauthenticated**, a single crafted front-office request is enough, and leads to remote code\nexecution and full compromise of the shop and its server.\n\n**Affected versions:** `3.0.0` through `4.0.3` (all versions since 3.0.0, including the latest release).\n\n\n### Patches\n\nUpgrade the `ps_facetedsearch` module to the patched version. Upgrading the module is the best action that removes the vulnerability.\n\nOtherwise, you can apply the fix manually in the file `src/Filters/Block.php`:\n\nIn the `getFromCache()` method, replace the native `unserialize()` call:\n\n```php\n// Before\nif (!empty($row)) {\n    return unserialize(current($row));\n}\n\n// After\nif (!empty($row)) {\n    return \\Tools::unSerialize(current($row));\n}\n```\n\n### Until the module is upgraded:\n\n- Remove price and weight slider filters from the filter templates that are exposed on the\n  front office.\n- Clear the faceted-search filter cache, and audit the `modules/ps_facetedsearch/` directory for\n  unexpected PHP files.\n- Monitor search requests for PHP serialization patterns (`O:`, `;i:`, references to classes such\n  as `Monolog\\…`) and block them at the WAF level.\n\n### Resources\n\n- Thank you to Frédéric Moreau (Antadis) and Gilles Caudal (Datalinx) for reporting this vulnerability.","status":"published","published":"2026-07-10T20:36:56Z","modified":"2026-07-10T20:36:58Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:40:42.703776Z"}],"nvd":[{"id":"CVE-2026-54159","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.","status":"published","published":"2026-07-17T21:17:07.963Z","modified":"2026-10-24T20:10:00.137Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:12:30.631352Z"}],"osv":[{"id":"CVE-2026-54159","title":"ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE","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.","status":"published","published":"2026-07-17T20:39:25.838Z","modified":"2026-10-28T02:30:49.050306406Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T15:45:08.132336Z"},{"id":"GHSA-m5f5-28qr-9g9r","title":"prestashop/ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE","description":"### Impact\n\nA PHP Object Injection vulnerability affects the PrestaShop module `ps_facetedsearch`.\n\nThe module rebuilds the selected search filters from the request URL. The value of a slider filter (**price** or **weight**) is taken from the URL without sufficient validation, then stored in an internal filter-block cache where it is serialized and later read back with a raw native `unserialize()`.\nBy crafting that value, an attacker can smuggle a malicious serialized PHP object into the cache. When it is deserialized, a gadget chain writes an arbitrary PHP file inside the module directory, which is then used as a webshell to run commands on the server.\n\n### Who is impacted\n\nAny shop using a vulnerable version of `ps_facetedsearch` that displays a filter template containing a slider filter (price or weight). Exploitation is remote and **unauthenticated**, a single crafted front-office request is enough, and leads to remote code\nexecution and full compromise of the shop and its server.\n\n**Affected versions:** `3.0.0` through `4.0.3` (all versions since 3.0.0, including the latest release).\n\n\n### Patches\n\nUpgrade the `ps_facetedsearch` module to the patched version. Upgrading the module is the best action that removes the vulnerability.\n\nOtherwise, you can apply the fix manually in the file `src/Filters/Block.php`:\n\nIn the `getFromCache()` method, replace the native `unserialize()` call:\n\n```php\n// Before\nif (!empty($row)) {\n    return unserialize(current($row));\n}\n\n// After\nif (!empty($row)) {\n    return \\Tools::unSerialize(current($row));\n}\n```\n\n### Until the module is upgraded:\n\n- Remove price and weight slider filters from the filter templates that are exposed on the\n  front office.\n- Clear the faceted-search filter cache, and audit the `modules/ps_facetedsearch/` directory for\n  unexpected PHP files.\n- Monitor search requests for PHP serialization patterns (`O:`, `;i:`, references to classes such\n  as `Monolog\\…`) and block them at the WAF level.\n\n### Resources\n\n- Thank you to Frédéric Moreau (Antadis) and Gilles Caudal (Datalinx) for reporting this vulnerability.","status":"published","published":"2026-07-10T20:36:56Z","modified":"2026-07-10T20:56:35.754523Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T15:46:51.463834Z"}]}}