CVE-2015-7808

EXPLOITED IN THE WILD

vBulletin 5 Connect <5.1.9 - Code Injection

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2015-7808 has been observed exploited in the wild (reported by VulnCheck KEV, InTheWild.io). EIP tracks 5 public exploits from researchers including Mohammad Reza Espargham, hhjj, Metasploit, including a Metasploit module exploits/multi/http/vbulletin_unserialize.

AI-analyzed exploit summary This exploit leverages a PHP object injection vulnerability in vBulletin 5.x via the `/ajax/api/hook/decodeArguments` endpoint. It achieves remote code execution by manipulating serialized objects to execute arbitrary system commands.

Description

The vB_Api_Hook::decodeArguments method in vBulletin 5 Connect 5.1.2 through 5.1.9 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via a crafted serialized object in the arguments parameter to ajax/api/hook/decodeArguments.

Exploits (5)

exploitdb WORKING POC VERIFIED
by Mohammad Reza Espargham · perlwebappsphp
https://www.exploit-db.com/exploits/38790

This exploit leverages a PHP object injection vulnerability in vBulletin 5.x via the `/ajax/api/hook/decodeArguments` endpoint. It achieves remote code execution by manipulating serialized objects to execute arbitrary system commands.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: vBulletin 5.x
No auth needed
Prerequisites: Target must be running vBulletin 5.x with the vulnerable endpoint exposed
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by hhjj · textwebappsphp
https://www.exploit-db.com/exploits/38629

This exploit leverages a PHP object injection vulnerability in vBulletin 5.1.x via the `decodeArguments` endpoint. It constructs a serialized payload that triggers the `__destruct` method of `vB_dB_Result`, leading to arbitrary method execution (e.g., `phpinfo`).

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: vBulletin 5.1.x
No auth needed
Prerequisites: Access to the `/ajax/api/hook/decodeArguments` endpoint
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC
by Metasploit · rubywebappsphp
https://www.exploit-db.com/exploits/48761

This Metasploit module exploits a PHP object injection vulnerability in vBulletin 5.1.2 to 5.1.9 via deserialization in the 'ajax/api/hook/decodeArguments' endpoint. It leverages the 'vB_dB_Result' class to execute arbitrary PHP code through the 'assert' function.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: vBulletin 5.0.X to 5.1.9
No auth needed
Prerequisites: vBulletin instance with vulnerable version · network access to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 1 stars
by Prajithp · remote
https://github.com/Prajithp/CVE-2015-7808

This repository contains a functional Perl exploit for CVE-2015-7808, a pre-authentication PHP object injection vulnerability in vBulletin. The exploit leverages unsafe deserialization in the `vB_dB_Result` class to execute arbitrary commands via the `assert` function.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: vBulletin (versions affected by CVE-2015-7808)
No auth needed
Prerequisites: Target must be running a vulnerable version of vBulletin · Perl environment to execute the script
devstral-2 · analyzed Feb 18, 2026 Full analysis →
metasploit WORKING POC EXCELLENT
by Netanel Rubin, cutz, Julien (jvoisin) Voisin · rubypocphp
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/vbulletin_unserialize.rb

This Metasploit module exploits a PHP object injection vulnerability in vBulletin 5.1.2 to 5.1.9 via unsafe unserialize in the 'decodeArguments' endpoint. It chains gadgets to achieve remote code execution by leveraging the 'vB_dB_Result' and 'vB_Database' classes.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: vBulletin 5.0.X - 5.1.X
No auth needed
Prerequisites: Target running vulnerable vBulletin version · Network access to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

EPSS 0.7904
EPSS Percentile 99.1%

Details

VulnCheck KEV 2021-04-12
InTheWild.io 2021-04-12
CWE
CWE-20
Status published
Products (16)
vbulletin/vbulletin 5.0.0
vbulletin/vbulletin 5.0.1
vbulletin/vbulletin 5.0.2
vbulletin/vbulletin 5.0.3
vbulletin/vbulletin 5.0.4
vbulletin/vbulletin 5.0.5
vbulletin/vbulletin 5.1.0 (2 CPE variants)
vbulletin/vbulletin 5.1.1
vbulletin/vbulletin 5.1.2 (4 CPE variants)
vbulletin/vbulletin 5.1.3 (2 CPE variants)
... and 6 more
Published Nov 24, 2015
Tracked Since Feb 18, 2026