CVE-2009-4520

The CCK Comment Reference module 5.x before 5.x-1.2 and 6.x before 6.x-1.3, a module for Drupal, allows remote attackers to bypass intended access restrictions and read comments by using the autocomplete path.

Published: 2009-12-31 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-4520 is rated Moderate Risk (43.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.24%). EPSS rose +1.05% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2009-4520

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 0.19% 1.24% +1.05%
2 2025-03-17 0.27% 0.19% -0.08%
3 2024-09-17 — 0.27% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-4520

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2009-4520

Affected software / configurations for CVE-2009-4520

Vendor Product Version Raw CPE
kristof_de_jaeger commentreference <= 5.x-1.1 cpe:2.3:a:kristof_de_jaeger:commentreference:*:*:*:*:*:*:*:*
kristof_de_jaeger commentreference <= 6.x-1.2 cpe:2.3:a:kristof_de_jaeger:commentreference:*:*:*:*:*:*:*:*
kristof_de_jaeger commentreference 5.x-1.0 cpe:2.3:a:kristof_de_jaeger:commentreference:5.x-1.0:*:*:*:*:*:*:*
kristof_de_jaeger commentreference 5.x-1.x-dev cpe:2.3:a:kristof_de_jaeger:commentreference:5.x-1.x-dev:*:*:*:*:*:*:*
kristof_de_jaeger commentreference 6.x-1.0 cpe:2.3:a:kristof_de_jaeger:commentreference:6.x-1.0:*:*:*:*:*:*:*
kristof_de_jaeger commentreference 6.x-1.1 cpe:2.3:a:kristof_de_jaeger:commentreference:6.x-1.1:*:*:*:*:*:*:*
kristof_de_jaeger commentreference 6.x-1.x-dev cpe:2.3:a:kristof_de_jaeger:commentreference:6.x-1.x-dev:*:*:*:*:*:*:*

References for CVE-2009-4520

cvelogic Threat Intelligence