SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2016-8580

PHP object injection vulnerabilities exist in multiple widget files in AlienVault OSSIM and USM before 5.3.2.

EXPLOIT ×2 ✓CRITICAL 9.8EPSS 6.86%

Does this matter?

2 public exploits are published in Exploit-DB (verified) and the impact is critical, while EPSS rates exploitation at 6.9%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.

Description

PHP object injection vulnerabilities exist in multiple widget files in AlienVault OSSIM and USM before 5.3.2. These vulnerabilities allow arbitrary PHP code execution via magic methods in included classes.

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
6.86% probability · 94th percentile
Public exploits
2 in Exploit-DB · verified · first 2 November 2016
CISA KEV
Not listed
Weakness
CWE-284
Affected
alienvault/open source security information and event management · alienvault/unified security management
Source
cve@mitre.org
EPSS trend
0%5%10%21 September 2026: 4.86%22 September 2026: 6.86%27 October 2026: 6.86%21 September 202627 October 2026

EPSS moved from 4.9% on 21 September 2026 to 6.9% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

Public exploits (2)

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.

EDB-IDTitleTypePublishedVerified
EDB-41424source ↗AlienVault OSSIM/USM < 5.3.1 - Remote Code Execution (Metasploit)php · Mehmet Incewebapps31 January 2017no
EDB-40682source ↗Alienvault OSSIM/USM 5.3.1 - PHP Object Injectionphp · Peter Lappwebapps2 November 2016yes

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.