Is CVE-2021-4301 actively exploited?

No active exploitation of CVE-2021-4301 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-4301 be exploited remotely?

Yes. CVE-2021-4301 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-4301?

CVE-2021-4301 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-4301

CWE-89Published: January 7, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A vulnerability was found in slackero phpwcms up to 1.9.26 and classified as critical. Affected by this issue is some unknown functionality. The manipulation of the argument $phpwcms['db_prepend'] leads to sql injection. The attack may be launched remotely. Upgrading to version 1.9.27 is able to address this issue. The patch is identified as 77dafb6a8cc1015f0777daeb5792f43beef77a9d. It is recommended to upgrade the affected component. VDB-217418 is the identifier assigned to this vulnerability.

NVD Source

Risk Analysis

A critical SQL injection vulnerability exists in phpwcms up to version 1.9.26. The CVSS score of 9.8 highlights the severity of this flaw, which can be exploited remotely to compromise the database.

No public exploit is known, but the vulnerability is remotely exploitable.

Recommended Action

Upgrade to phpwcms version 1.9.27 or apply the patch 77dafb6a8cc1015f0777daeb5792f43beef77a9d.

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-2021-4301 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.