CVE-2022-37721: PyroCMS Stored Cross Site Scripting Vulnerability
Summary
CVE-2022-37721: PyroCMS vulnerable to stored Cross Site Scripting. Affects pyrocms/pyrocms versions < 3.9.1. No fix is published. How to fix ↓
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Background
PyroCMS is an open-source content management system built on the Laravel framework. It provides a user-friendly interface for managing website content and includes features such as blogging, page management, and user authentication. PyroCMS version 3.9 and below are affected by a stored Cross Site Scripting (XSS) vulnerability. This vulnerability allows low privileged users, such as authors, to inject malicious HTML and JavaScript code into blog posts, potentially leading to full admin account takeover or privilege escalation.
Vulnerability Detail
The stored Cross Site Scripting (XSS) vulnerability in PyroCMS arises when an attacker with low privileges, such as an author, injects crafted HTML and JavaScript code into a blog post. This malicious code is then stored in the database and executed when the blog post is viewed by other users. As a result, the attacker can perform actions on behalf of the targeted user, potentially gaining full administrative access or escalating their privileges within the system. This vulnerability has a CVSS score of 9.0, indicating its critical severity.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can disable the ability for low privileged users to create or edit blog posts. This can be achieved by adjusting the user roles and permissions within PyroCMS. By restricting the ability to inject content into blog posts, the risk of exploitation can be mitigated. However, this workaround may impact the functionality and user experience of the system.
Conclusion
PyroCMS version 3.9 and below are vulnerable to a stored Cross Site Scripting (XSS) vulnerability. This can be exploited by low privileged users to inject malicious code into blog posts, potentially leading to full admin account takeover or privilege escalation. To mitigate this vulnerability, it is crucial to upgrade PyroCMS to version 3.9.2 or later, sanitize user-generated content, and implement input validation. For further support on vulnerability remediation, contact DevNack.com.
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FAQ
PyroCMS is an open-source content management system built on the Laravel framework. It provides a user-friendly interface for managing website content and includes features such as blogging, page management, and user authentication.
A stored Cross Site Scripting (XSS) vulnerability occurs when an application stores user-supplied data without proper validation or sanitization. This allows an attacker to inject malicious code that is then executed by other users when they view the affected content.
The stored XSS vulnerability in PyroCMS can lead to full admin account takeover or privilege escalation. An attacker with low privileges, such as an author, can inject malicious code into blog posts, which is then executed by other users. This allows the attacker to perform actions on behalf of the targeted user, potentially gaining full administrative access or escalating their privileges within the system.
To fix this vulnerability, it is recommended to upgrade PyroCMS to version 3.9.2 or later. The latest release includes a patch that addresses the XSS vulnerability. Users should also sanitize user-generated content and implement input validation to prevent the injection of malicious code.
As a temporary workaround, users can disable the ability for low privileged users to create or edit blog posts. This can be achieved by adjusting the user roles and permissions within PyroCMS. By restricting the ability to inject content into blog posts, the risk of exploitation can be mitigated. However, this workaround may impact the functionality and user experience of the system.
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