CVE-2019-5434An attacker could send a specifically crafted payload to the XML-RPC invocation script and trigger the unserialize() call on the "what"…
- 9.8CriticalCVSS base score
- 57.0%Exploitation in 30 daysEPSS · top 0.9% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 2Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Nuclei template and an Exploit-DB entry for it.
Show the exploits2
Nuclei templates1 template
- Revive Adserver 4.2 - Remote Code Execution (Nuclei template) (opens in a new tab)
http/cves/2019/CVE-2019-5434.yamlSeverity critical
Exploit-DB1 entry
- Revive Adserver 4.2 - Remote Code Execution (Exploit-DB entry) (opens in a new tab)
EDB-ID 47739webapps, phppublished 3 Dec 2019Not verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By hackerone
- 4 months later
· 4 months later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 57.0% · top 0.9% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
Revive Adserver
- affected Fixed version v4.2.0
References
References4
- https://hackerone.com/reports/512076 (opens in a new tab)x_refsource_MISCx_transferred
- https://hackerone.com/reports/542670 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.revive-adserver.com/security/revive-sa-2019-001/ (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/155559/Revive-Adserver-4.2-Remote-Code-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-15024 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-5434)Record last updated .