CVE-2006-4450

Exp

usercp_avatar.php in PHPBB 2.0.20, when avatar uploading is enabled, allows remote attackers to use the server as a web proxy by submitting a URL to the avatarurl parameter, which is then used in an HTTP GET request.

Published: 2006-08-30 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-4450 is rated High Exploit Risk (65.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 4.01%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2006-4450

EDB-ID Source Kind Published Link
27863 exploit_db edb 2006-05-12 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2006-4450

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 4.79% 4.01% -0.78%
2 2025-04-18 3.97% 4.79% +0.81%
3 2025-03-30 — 3.97% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-4450

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.1 2.0 MEDIUM
AV:N/AC:H/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 4.9 6.4 [email protected]

Weakness enumeration for CVE-2006-4450

Affected software / configurations for CVE-2006-4450

Vendor Product Version Raw CPE
phpbb_group phpbb 2.0.20 cpe:2.3:a:phpbb_group:phpbb:2.0.20:*:*:*:*:*:*:*

References for CVE-2006-4450

cvelogic Threat Intelligence