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Object injection can be used to trigger destruct in the loaded PHP classes, e.g. the Archive_Tar class itself. With Archive_Tar object injection, arbitrary file deletion can occur because `@unlink($this->_temp_tarname)` is called. If another class with useful gadget is loaded, it may possible to cause remote code execution that can result in files being deleted or possibly modified.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1000888.json","reference_id":"","reference_type":"","scores":[{"value":"8.1","scoring_system":"cvssv3","scoring_elements":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1000888.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2018-1000888","reference_id":"","reference_type":"","scores":[{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96626","published_at":"2026-04-29T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96575","published_at":"2026-04-01T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96622","published_at":"2026-04-24T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96621","published_at":"2026-04-21T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96618","published_at":"2026-04-18T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96613","published_at":"2026-04-16T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96607","published_at":"2026-04-13T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96604","published_at":"2026-04-12T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96602","published_at":"2026-04-09T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.966","published_at":"2026-04-08T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96593","published_at":"2026-04-07T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96589","published_at":"2026-04-04T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96585","published_at":"2026-04-02T12:55:00Z"},{"value":"0.29482","scoring_system":"epss","scoring_elements":"0.96623","published_at":"2026-04-26T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2018-1000888"},{"reference_url":"https://blog.ripstech.com/2018/new-php-exploitation-technique/","reference_id":"","reference_type":"","scores":[],"url":"https://blog.ripstech.com/2018/new-php-exploitation-technique/"},{"reference_url":"https://cdn2.hubspot.net/hubfs/3853213/us-18-Thomas-It%27s-A-PHP-Unserialization-Vulnerability-Jim-But-Not-As-We-....pdf","reference_id":"","reference_type":"","scores":[],"url":"https://cdn2.hubspot.net/hubfs/3853213/us-18-Thomas-It%27s-A-PHP-Unserialization-Vulnerability-Jim-But-Not-As-We-....pdf"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000888","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000888"},{"reference_url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/pear/archive_tar/CVE-2018-1000888.yaml","reference_id":"","reference_type":"","scores":[{"value":"8.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/pear/archive_tar/CVE-2018-1000888.yaml"},{"reference_url":"https://github.com/pear/Archive_Tar","reference_id":"","reference_type":"","scores":[{"value":"8.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pear/Archive_Tar"},{"reference_url":"https://github.com/pear/Archive_Tar/commit/59ace120ac5ceb5f0d36e40e48e1884de1badf76","reference_id":"","reference_type":"","scores":[{"value":"8.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pear/Archive_Tar/commit/59ace120ac5ceb5f0d36e40e48e1884de1badf76"},{"reference_url":"https://lists.debian.org/debian-lts-announce/2019/02/msg00020.html","reference_id":"","reference_type":"","scores":[{"value":"8.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.debian.org/debian-lts-announce/2019/02/msg00020.html"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2018-1000888","reference_id":"","reference_type":"","scores":[{"value":"6.8","scoring_system":"cvssv2","scoring_elements":"AV:N/AC:M/Au:N/C:P/I:P/A:P"},{"value":"8.8","scoring_system":"cvssv3","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"value":"8.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE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