{"id":"CVE-2019-5434","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-5434","generatedAt":"2026-10-28T00:30:13.301Z","title":"An attacker could send a specifically crafted payload to the XML-RPC invocation script and trigger the unserialize() call on the \"what\" parameter in the \"openads.spc\" RPC method.","description":"An attacker could send a specifically crafted payload to the XML-RPC invocation script and trigger the unserialize() call on the \"what\" parameter in the \"openads.spc\" RPC method. Such vulnerability could be used to perform various types of attacks, e.g. exploit serialize-related PHP vulnerabilities or PHP object injection. It is possible, although unconfirmed, that the vulnerability has been used by some attackers in order to gain access to some Revive Adserver instances and deliver malware through them to third party websites. This vulnerability was addressed in version 4.2.0.","published":"2019-05-06T17:29:01.000Z","lastModified":"2026-06-17T02:37:41.000Z","status":"Modified","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-502"],"affected":["revive-sas/revive adserver"],"epss":{"score":0.57022,"percentile":0.99062,"date":"2026-10-26","history":[{"date":"2026-09-21","score":0.26832,"percentile":0.97988},{"date":"2026-09-22","score":0.57022,"percentile":0.99024}]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2019-12-03","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":47739,"kind":"exploit","title":"Revive Adserver 4.2 - Remote Code Execution","url":"https://www.exploit-db.com/exploits/47739","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/webapps/47739.php","file":"exploits/php/webapps/47739.php","published":"2019-12-03","added":"2019-12-03","updated":"2019-12-03","author":"crlf","type":"webapps","platform":"php","port":null,"verified":false,"codes":["CVE-2019-5434"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comrevive-adserver-4.2.0.tar.gz","screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 57.0%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.57022,"from":0.26832,"percentile":0.99024},"summary":"EPSS moved from 26.8% to 57.0% probability of exploitation in the next thirty days."},{"kind":"epss","label":"EPSS jump","at":"2026-09-21T00:00:00.000Z","detail":{"to":0.26832,"from":0.57022,"percentile":0.97988},"summary":"EPSS moved from 57.0% to 26.8% probability of exploitation in the next thirty days."}],"references":[{"url":"http://packetstormsecurity.com/files/155559/Revive-Adserver-4.2-Remote-Code-Execution.html","source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/512076","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/542670","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://www.revive-adserver.com/security/revive-sa-2019-001/","tags":["Vendor Advisory"],"source":"support@hackerone.com"},{"url":"http://packetstormsecurity.com/files/155559/Revive-Adserver-4.2-Remote-Code-Execution.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/512076","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/542670","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.revive-adserver.com/security/revive-sa-2019-001/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-5434","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}