CVE-2019-5434
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.
Does this matter?
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.
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 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 57.02% probability · 99th percentile
- Public exploits
- 1 in Exploit-DB · first 3 December 2019
- CISA KEV
- Not listed
- Weakness
- CWE-502
- Affected
- revive-sas/revive adserver
- Source
- support@hackerone.com
EPSS moved from 26.8% on 21 September 2026 to 57.0% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/155559/Revive-Adserver-4.2-Remote-Code-Execution.html
- https://hackerone.com/reports/512076Third Party Advisory
- https://hackerone.com/reports/542670Third Party Advisory
- https://www.revive-adserver.com/security/revive-sa-2019-001/Vendor Advisory
- http://packetstormsecurity.com/files/155559/Revive-Adserver-4.2-Remote-Code-Execution.html
- https://hackerone.com/reports/512076Third Party Advisory
- https://hackerone.com/reports/542670Third Party Advisory
- https://www.revive-adserver.com/security/revive-sa-2019-001/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.