Learn about CVE-2023-1776 affecting Mattermost boards. High severity with base score of 7.3. Mitigate risk by updating to version 7.8.0 or higher.
This CVE record was published by Mattermost and involves a vulnerability that allows an attacker to upload a malicious SVG image file on boards in Mattermost.
Understanding CVE-2023-1776
This vulnerability, titled "Stored XSS via SVG attachment on Boards," poses a risk to Mattermost systems that could be exploited by attackers.
What is CVE-2023-1776?
The vulnerability in Mattermost allows attackers to upload a malicious SVG image file as an attachment to a card and share it using a direct link, potentially leading to stored Cross-Site Scripting (XSS) attacks.
The Impact of CVE-2023-1776
This vulnerability has a high severity level with a base score of 7.3 and can result in confidentiality and integrity impacts. Attackers with low privileges can exploit this vulnerability without advanced user interaction.
Technical Details of CVE-2023-1776
The following technical details outline the vulnerability in more depth:
Vulnerability Description
The vulnerability in Mattermost enables attackers to upload a malicious SVG image on boards and share it via a direct link, potentially leading to stored XSS attacks.
Affected Systems and Versions
Mattermost versions 3.3.0 to 7.7.1 are affected by this vulnerability. Versions 7.1.5 to less than 7.8.0 are also impacted.
Exploitation Mechanism
Attackers can take advantage of this vulnerability by uploading a malicious SVG image file as an attachment to a card and sharing it via a direct link within Mattermost.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risk posed by CVE-2023-1776 and implement long-term security practices to prevent similar vulnerabilities in the future.
Immediate Steps to Take
Users are advised to update Mattermost to version 7.8.0, 7.1.6, 7.7.2, or higher to address this vulnerability and enhance security.
Long-Term Security Practices
Implement security best practices such as regular security audits, user education on phishing and malicious file uploads, and timely software updates to mitigate risks proactively.
Patching and Updates
Regularly apply security patches and updates provided by Mattermost to ensure that systems are protected against known vulnerabilities and potential security threats.