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CVE-2006-4271

24
FAUCET Score

CVE-2006-4271 describes a remote file inclusion vulnerability in Jelsoft vBulletin version 3.5.4, specifically within the install/upgrade_301.php script. This flaw allows unauthenticated remote attackers to execute arbitrary PHP code by manipulating the 'step' parameter. With a CVSS score of 7.5 (High), the vulnerability has a low attack complexity and could lead to partial compromise of confidentiality, integrity, and availability. While the vendor disputes the vulnerability, citing required authentication for the upgrade system, there is no evidence of active exploitation, nor are there publicly available exploit modules like Metasploit or Nuclei. However, the CVE has garnered significant community discussion, with 10 mentions indicating notable interest.

Impacted Technologies

VendorProductVersion(s)CPE
3.5.4CPE matchmatch criteria
cpe:2.3:a:jelsoft:vbulletin:3.5.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.07%
Probability of exploitation in next 30 days
EPSS Percentile
79.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0207 is in the 64th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

archives.neohapsis.com / archives/bugtraq/2006-07/0061.html
Exploit
archives.neohapsis.com / archives/bugtraq/2006-07/0069.html
archives.neohapsis.com / archives/bugtraq/2006-07/0121.html
archives.neohapsis.com / archives/bugtraq/2006-07/0217.html
osvdb.org / 28210
pldsoft.com / forum/showthread.php