Is CVE-2023-34461 actively exploited?

No active exploitation of CVE-2023-34461 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-34461 be exploited remotely?

Yes. CVE-2023-34461 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-34461?

CVE-2023-34461 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2023-34461

CWE-79Published: June 19, 2023· Updated: Jun 17, 2026

5.4

CVSS v3.1

Official Description

PyBB is an open source bulletin board. A manual code review of the PyBB bulletin board server has revealed that a vulnerability could have been exploited in which users could submit any type of HTML tag, and have said tag run. For example, a malicious `<a>` that looks like ```<a href=javascript:alert (1)>xss</a>``` could have been used to run code through JavaScript on the client side. The problem has been patched as of commit `5defd92`, and users are advised to upgrade. Attackers do need posting privilege in order to exploit this vulnerability. This vulnerability is present within the 0.1.0 release, and users are advised to upgrade to 0.1.1. Users unable to upgrade may be able to work around the attack by either; Removing the ability to create posts, removing the `|safe` tag from the Jinja2 template titled "post.html" in templates or by adding manual validation of links in the post creation section.

NVD Source

Technical Analysis

CVE-2023-34461 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.