Is CVE-2023-3687 actively exploited?

No active exploitation of CVE-2023-3687 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-3687 be exploited remotely?

Yes. CVE-2023-3687 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-3687?

CVE-2023-3687 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-3687

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

9.8

CVSS v3.1

Official Description

A vulnerability was found in Bylancer QuickVCard 2.1. It has been rated as critical. This issue affects some unknown processing of the file /blog of the component GET Parameter Handler. The manipulation of the argument s leads to sql injection. The attack may be initiated remotely. The identifier VDB-234233 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

NVD Source

Risk Analysis

Bylancer QuickVCard 2.1 is vulnerable to SQL injection in the blog component. Remote attackers can manipulate the 's' parameter to execute unauthorized database queries. This critical flaw is remotely exploitable.

No public exploit is known for this vulnerability, and it is not in the CISA KEV catalog.

Recommended Action

Users should implement input validation for the affected GET parameter or contact the vendor for a patch.

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-2023-3687 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.