{"id":"CVE-2026-103896","title":"The 10Web Booster – Website speed optimization, Cache & Page Speed optimizer plugin for WordPress is vulnerable to a limited file write via path traversal in versions up to, and including, 2.34.5 This is due to the OptimizerWebPageCache:…","summary":"The 10Web Booster – Website speed optimization, Cache & Page Speed optimizer plugin for WordPress is vulnerable to a limited file write via path traversal in versions up to, and including, 2.34.5 This is due to the OptimizerWebPageCache:…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-22"],"vendor":"10web","product":"10Web Booster – Website speed optimization, Cache & Page Speed optimizer","affected":["booster_website_speed_optimization_cache_page_speed_optimizer <= 2.34.5"],"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:17:02.663","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103896","references":[{"url":"https://plugins.trac.wordpress.org/browser/tenweb-speed-optimizer/tags/2.34.5/includes/WebPageCache/OptimizerWebPageCache.php#L190","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/tenweb-speed-optimizer/tags/2.34.5/includes/WebPageCache/OptimizerWebPageCache.php#L205","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/tenweb-speed-optimizer/tags/2.34.5/includes/WebPageCache/OptimizerWebPageCache.php#L312","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/tenweb-speed-optimizer/tags/2.34.5/includes/WebPageCache/OptimizerWebPageValidations.php#L299","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/tenweb-speed-optimizer/tags/2.34.8","label":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/83e672e7-2483-46e9-ae16-a9e7ccc4bcb8?source=cve","label":"security@wordfence.com"}],"tags":["nvd","cve.org"],"epss":0.00464,"epssPercentile":0.40016,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T14:55:48.533241Z"},"ingestedAt":"2026-10-16T06:00:00.391Z","slug":"CVE-2026-103896","body":"## Overview\n\nThe 10Web Booster – Website speed optimization, Cache & Page Speed optimizer plugin for WordPress is vulnerable to a limited file write via path traversal in versions up to, and including, 2.34.5 This is due to the OptimizerWebPageCache::get_cache_file_dir() function concatenating raw, unsanitized $_GET parameter names and values into the on-disk cache path, and the cache_content() sink calling mkdir() and file_put_contents() on the result with no realpath containment check — unlike the sibling delete_page_cache(), which does perform one. This makes it possible for unauthenticated attackers to create arbitrary directories (mode 0777, recursively) outside the cache root and write a cached page into them. The write is LIMITED: the filename is always 'source.html', so the extension is fixed, and the content is the rendered page buffer rather than attacker-supplied data. PHP files cannot be written and code execution is not possible; the demonstrated impact is cache poisoning and arbitrary directory creation.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}