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CVE-2022-41938 : Security Advisory and Response

Learn about CVE-2022-41938, a critical Cross-site scripting vulnerability in Flarum affecting versions v1.5.0 to v1.6.1. Upgrade to version v1.6.2 for immediate protection.

A Cross-site scripting vulnerability with discussion titles in Flarum has been discovered and fixed. Find out the impact, technical details, and how to mitigate this CVE.

Understanding CVE-2022-41938

Flarum, an open source discussion platform, had a security flaw in its page title system that allowed malicious HTML injection through discussion titles, affecting versions

v1.5.0
to
v1.6.1
.

What is CVE-2022-41938?

The vulnerability in Flarum's page title system post

v1.5
could be exploited by attackers to inject harmful HTML markup via discussion titles, leading to Cross-site scripting attacks.

The Impact of CVE-2022-41938

This critical vulnerability affected all Flarum communities using versions between

v1.5.0
to
v1.6.1
. An attacker could execute arbitrary scripts in the context of a user's browser, jeopardizing data confidentiality, integrity, and availability.

Technical Details of CVE-2022-41938

The following details provide insight into the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The flaw in Flarum's page title system allowed attackers to embed malicious HTML code via discussion titles, triggering XSS attacks when visitors accessed affected discussion pages.

Affected Systems and Versions

The Cross-site scripting vulnerability impacted Flarum framework versions

>= 1.5.0
and
< 1.6.2
.

Exploitation Mechanism

Attackers could exploit the vulnerability by injecting malicious HTML markup using discussion titles in Flarum pages post

v1.5
, compromising user interactions with the platform.

Mitigation and Prevention

Protecting your systems from CVE-2022-41938 involves immediate actions and long-term security practices.

Immediate Steps to Take

All Flarum communities running versions between

v1.5.0
to
v1.6.1
must upgrade to the fixed version
v1.6.2
to address the vulnerability and prevent potential XSS attacks.

Long-Term Security Practices

Implement secure coding practices, regularly update Flarum and other software components, and conduct security assessments to identify and remediate vulnerabilities proactively.

Patching and Updates

Ensure timely installation of patches and updates released by Flarum to mitigate known vulnerabilities and enhance the overall security posture of your community platform.

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