PatchTheCVECVE-2019-5434: An attacker could send a specifically crafted payload to the XML-RPC invocation script and trigger the unseria
CVE-2019-5434 is a critical-severity flaw (CVSS 9.8) affecting revive adserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- Critical severity
- EPSS top 1%: very likely to be exploited
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 57.0% (top 1%) |
| CISA exploited list | No |
| Weakness | CWE-502 |
| Published | 2019-05-06 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Exploit-DB: Revive Adserver 4.2 - Remote Code Execution
- Nuclei scan template: Revive Adserver 4.2 - Remote Code Execution
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2019-5434?
revive adserver: upgrade to 4.2.0. Exact commands for each OS are on this page.
Is CVE-2019-5434 being exploited?
CVE-2019-5434 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2019-5434 affect?
CVE-2019-5434 affects revive adserver. Severity is critical (CVSS 9.8). 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
How urgent is CVE-2019-5434?
Priority 69/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action
Software pages
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