---
title: "CVE-2019-5434: Deserialization of Untrusted Data | CubePath"
description: "An attacker could send a specifically crafted payload to the XML-RPC invocation script and trigger the unserialize() call on the \"what\" parameter…"
language: en
source: https://cubepath.com/security/cve/CVE-2019-5434
---

# CVE-2019-5434: Deserialization of Untrusted Data | CubePath

## 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.

Official description from the CVE record, published by hackerone. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-5434)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.57022 (57.0% probability)

Percentile

99.1%

Scores of

Nov 10, 2026

Model

v2026.06.15

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-502](https://cwe.mitre.org/data/definitions/502.html) Deserialization of Untrusted Data

## Affected products

Products listed in the CVE record, as the CNA published them.

- Revive Adserver

  - affected: Fixed version v4.2.0

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [hackerone.com/reports/512076](https://hackerone.com/reports/512076)
- [hackerone.com/reports/542670](https://hackerone.com/reports/542670)
- [revive-adserver.com/security/revive-sa-2019-001](https://www.revive-adserver.com/security/revive-sa-2019-001/)
- [packetstormsecurity.com/files/155559/Revive-Adserver-4.2-Re…](http://packetstormsecurity.com/files/155559/Revive-Adserver-4.2-Remote-Code-Execution.html)

## Timeline

1. ID reserved Jan 4, 2019
2. Record published May 6, 2019
3. Record last updated Aug 4, 2024

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:01 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)