Is CVE-2021-45255 actively exploited?

No active exploitation of CVE-2021-45255 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-45255 be exploited remotely?

Yes. CVE-2021-45255 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-45255?

CVE-2021-45255 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-45255

CRITICAL

CVE-2021-45255

CWE-89Published: December 21, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

The email parameter from ajax.php of Video Sharing Website 1.0 appears to be vulnerable to SQL injection attacks. A payload injects a SQL sub-query that calls MySQL's load_file function with a UNC file path that references a URL on an external domain. The application interacted with that domain, indicating that the injected SQL query was executed.

NVD Source

Technical Analysis

CVE-2021-45255 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.