Is CVE-2021-24221 actively exploited?

No active exploitation of CVE-2021-24221 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-24221 be exploited remotely?

Yes. CVE-2021-24221 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-24221?

CVE-2021-24221 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2021-24221

HIGH

CVE-2021-24221

CWE-89Published: April 12, 2021· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

The Quiz And Survey Master – Best Quiz, Exam and Survey Plugin for WordPress plugin before 7.1.12 did not sanitise the result_id GET parameter on pages with the [qsm_result] shortcode without id attribute, concatenating it in a SQL statement and leading to an SQL injection. The lowest role allowed to use this shortcode in post or pages being author, such user could gain unauthorised access to the DBMS. If the shortcode (without the id attribute) is embed on a public page or post, then unauthenticated users could exploit the injection.

NVD Source

Technical Analysis

CVE-2021-24221 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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 8.8.

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