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

CVE-2023-34461 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.3%.

Is there a patch available for CVE-2023-34461?

Yes, a patch is available for CVE-2023-34461. Update the affected software to the latest version immediately.

Pybb CVE-2023-34461

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2023-06-19 security-advisories@github.com

XSS Pybb

5.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

CVE Published

Jun 19, 2023 - 18:15 nvd

MEDIUM 5.4

DescriptionNVD

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.

AnalysisAI

PyBB is an open source bulletin board. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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. Affected products include: Pybb Project Pybb.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.