{"cve":"CVE-2019-5434","nvd":{"published":"2019-05-06T17:29:00.730","modified":"2026-06-17T02:37:40.897","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-502"],"references":["http://packetstormsecurity.com/files/155559/Revive-Adserver-4.2-Remote-Code-Execution.html","https://hackerone.com/reports/512076","https://hackerone.com/reports/542670","https://www.revive-adserver.com/security/revive-sa-2019-001/","http://packetstormsecurity.com/files/155559/Revive-Adserver-4.2-Remote-Code-Execution.html"],"products":["revive-sas:revive_adserver"],"source":"nvd","synced_at":"2026-10-19T20:56:19.218283075+00:00"},"epss":{"cve":"CVE-2019-5434","score":0.57022,"percentile":0.99069,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}