Is CVE-2023-33977 actively exploited?

No active exploitation of CVE-2023-33977 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-33977 be exploited remotely?

Yes. CVE-2023-33977 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-33977?

CVE-2023-33977 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2023-33977

CWE-79Published: June 6, 2023· Updated: Jun 17, 2026

5.4

CVSS v3.1

Official Description

Kiwi TCMS is an open source test management system for both manual and automated testing. Kiwi TCMS allows users to upload attachments to test plans, test cases, etc. Earlier versions of Kiwi TCMS had introduced upload validators in order to prevent potentially dangerous files from being uploaded and Content-Security-Policy definition to prevent cross-site-scripting attacks. The upload validation checks were not 100% robust which left the possibility to circumvent them and upload a potentially dangerous file which allows execution of arbitrary JavaScript in the browser. Additionally we've discovered that Nginx's `proxy_pass` directive will strip some headers negating protections built into Kiwi TCMS when served behind a reverse proxy. This issue has been addressed in version 12.4. Users are advised to upgrade. Users unable to upgrade who are serving Kiwi TCMS behind a reverse proxy should make sure that additional header values are still passed to the client browser. If they aren't redefining them inside the proxy configuration.

NVD Source

Technical Analysis

CVE-2023-33977 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.

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.