Is CVE-2021-4313 actively exploited?

No active exploitation of CVE-2021-4313 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-4313 be exploited remotely?

Yes. CVE-2021-4313 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-4313?

CVE-2021-4313 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-4313

CWE-89Published: January 16, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A vulnerability was found in NethServer phonenehome. It has been rated as critical. This issue affects the function get_info/get_country_coor of the file server/index.php. The manipulation leads to sql injection. The identifier of the patch is 759c30b0ddd7d493836bbdf695cf71624b377391. It is recommended to apply a patch to fix this issue. The identifier VDB-218393 was assigned to this vulnerability.

NVD Source

Risk Analysis

NethServer phonenehome is vulnerable to SQL injection via the get_info/get_country_coor function. This critical flaw is remotely exploitable without authentication, warranting immediate attention due to its 9.8 CVSS score.

No public exploit is currently known, and the vulnerability is not in the CISA KEV catalog.

Recommended Action

Apply the patch identified by hash 759c30b0ddd7d493836bbdf695cf71624b377391.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-4313 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-89): SQL injection vulnerabilities allow attackers to manipulate database queries, potentially exposing or modifying sensitive data.