Is CVE-2021-33348 actively exploited?

No active exploitation of CVE-2021-33348 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-33348 be exploited remotely?

Yes. CVE-2021-33348 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-33348?

CVE-2021-33348 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2021-33348

CWE-79Published: June 24, 2021· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

An issue was discovered in JFinal framework v4.9.10 and below. The "set" method of the "Controller" class of jfinal framework is not strictly filtered, which will lead to XSS vulnerabilities in some cases.

NVD Source

Technical Analysis

CVE-2021-33348 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.