CVE-2013-3631

Exp

NAS4Free 9.1.0.1.804 and earlier allows remote authenticated users to execute arbitrary PHP code via a request to exec.php, aka the "Advanced | Execute Command" feature. NOTE: this issue might not be a vulnerability, since it appears to be part of legitimate, intentionally-exposed functionality by the developer and is allowed within the intended security policy.

Published: 2013-11-02 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-3631 is rated High Exploit Risk (71.8/100): CVSS Medium severity, with high exploitation likelihood (EPSS 49.36%, 98th percentile). 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-2013-3631

EDB-ID Source Kind Published Link
29320 exploit_db edb 2013-10-31 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-3631

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 2025-12-23 50.70% 49.36% -1.34%
2 2025-10-24 52.54% 50.70% -1.83%
3 2025-08-07 — 52.54% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-3631

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.0 2.0 MEDIUM
AV:N/AC:M/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.8 6.4 [email protected]

Weakness enumeration for CVE-2013-3631

Affected software / configurations for CVE-2013-3631

Vendor Product Version Raw CPE
nas4free nas4free <= 9.1.0.1.804 cpe:2.3:a:nas4free:nas4free:*:*:*:*:*:*:*:*
nas4free nas4free 9.1.0.1.798 cpe:2.3:a:nas4free:nas4free:9.1.0.1.798:*:*:*:*:*:*:*

References for CVE-2013-3631

cvelogic Threat Intelligence