{"id":"CVE-2026-104021","revision":null,"records":[{"revision":"14bcf3ab15284b70b45177e482e47680","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-104021","aliases":[],"title":"Fastcache by Host.it <= 1.7.4 - Authenticated (Administrator+) Code Injection via .htaccess Directive Injection via 'cache_cookie_exclude' Setting","description":"The Fastcache by Host.it plugin for WordPress is vulnerable to Code Injection in all versions up to, and including, 1.7.4 via the `fastcache_settings[cache_cookie_exclude][]` parameter. This is due to the plugin registering the `cache_cookie_exclude` setting via `register_setting()` without a `sanitize_callback`, while `buildSiteHtaccessRules()` applies only `trim()` to each cookie value before interpolating it directly into an Apache `RewriteCond` line — a normalization that strips surrounding whitespace but leaves embedded newlines intact, allowing an attacker to break out of the capture group and append arbitrary directives. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary Apache directives into the site's `.htaccess` file via `file_put_contents()`, enabling server-level configuration changes such as setting `php_value auto_prepend_file` to execute attacker-controlled PHP code on every request.","state":0,"publishedAt":"2026-10-10T04:26:48.359+00:00","modifiedAt":"2026-10-11T16:55:19.067+00:00","affected":[{"ecosystem":"Vendor product","name":"Fastcache by Host.it","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"hostspa\",\n                    \"product\": \"Fastcache by Host.it\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"lessThanOrEqual\": \"1.7.4\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":7.2,"severity":"HIGH"}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/d72d7a21-0bea-4a32-b92b-326f47998b80?source=cve","https://plugins.trac.wordpress.org/browser/fastcache-by-host-it/tags/1.7.4/src/Core/Platform/Utility.php#L545","https://plugins.trac.wordpress.org/browser/fastcache-by-host-it/tags/1.7.4/src/Core/Platform/Utility.php#L420","https://plugins.trac.wordpress.org/browser/fastcache-by-host-it/tags/1.7.4/src/Core/Platform/Utility.php#L521","https://plugins.trac.wordpress.org/browser/fastcache-by-host-it/tags/1.7.4/src/Dispatcher.php#L480","https://plugins.trac.wordpress.org/browser/fastcache-by-host-it/tags/1.7.4/src/Admin.php#L73","https://plugins.trac.wordpress.org/changeset?reponame=&old=3735944%40fastcache-by-host-it&new=3735944%40fastcache-by-host-it"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-104021","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-104021","identifiers":["CVE-2026-104021"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-d438db76762e40e09fae683c91dc71f3","complete":true,"records":13691,"lastAttemptAt":"2026-11-10T11:26:02.3053181+00:00","lastSuccessAt":"2026-11-10T11:26:02.298+00:00","error":null,"lastVerifiedAt":"2026-11-10T11:26:02.298+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13744,"expectedIdentifiers":13744,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-10T11:25:04.0778179+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-10T11:25:04.0778179+00:00","lastSuccessAt":"2026-11-10T11:25:05.0144698+00:00","error":null,"lastVerifiedAt":"2026-11-10T11:25:05.0144706+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-c3b5116d0840469fb49189e776b1e7eb","complete":false,"records":13697,"lastAttemptAt":"2026-11-10T11:25:33.4594859+00:00","lastSuccessAt":"2026-11-10T11:25:33.455+00:00","error":"100 identifier lookups failed; latest failures include request timeout. 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