Is CVE-2021-23824 actively exploited?

No active exploitation of CVE-2021-23824 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-23824 be exploited remotely?

Yes. CVE-2021-23824 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-23824?

CVE-2021-23824 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2021-23824

CWE-79Published: January 13, 2022· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

This affects the package Crow before 0.3+4. When using attributes without quotes in the template, an attacker can manipulate the input to introduce additional attributes, potentially executing code. This may lead to a Cross-site Scripting (XSS) vulnerability, assuming an attacker can influence the value entered into the template. If the template is used to render user-generated content, this vulnerability may escalate to a persistent XSS vulnerability.

NVD Source

Technical Analysis

CVE-2021-23824 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.