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Explore the critical vulnerabilities CVE-2023–22527, CVE-2023–22515, and CVE-2023–22518 in Atlassian Confluence, their impacts, discovery, and how they operate.
In January 2024, the cybersecurity community turned its attention to a critical vulnerability in Atlassian Confluence Data Center and Server, identified as CVE-2023–22527.
This vulnerability, alongside CVE-2023–22515 and CVE-2023–22518, represents a series of security challenges faced by users of the popular collaboration software.
This article provides an in-depth look at each of these vulnerabilities, their discovery, and how they work, highlighting the urgent need for awareness and action among the cybersecurity and developer communities.
Discovery Date: CVE-2023–22527 was disclosed on January 16, 2024, signaling a crucial moment for Atlassian in its efforts to safeguard the Confluence platform against threats. The criticality of this vulnerability is underscored by its CVSS score of 10.0, signaling maximum severity in terms of impact and exploitability.
How It Works: CVE-2023–22527 allows unauthenticated attackers to execute arbitrary code remotely by exploiting a template injection flaw in out-of-date versions of Confluence Data Center and Server. The vulnerability arises from the application’s handling of user input, enabling attackers to inject malicious templates that lead to remote code execution (RCE) without requiring user interaction.
Breaking Down the Exploit Strategy: Here is a potential PoC I found on the internet:# @Time : 2024/1/23
# @Author : Nguyễn Đức Mạnh (MINKAY)
# @Vulnerability : CVE-2023-22527 - RCE (Remote Code Execution) Vulnerability In Confluence Data Center and Confluence Server
from bs4 import BeautifulSoup
from urllib.parse import urlparse
parsed_url = urlparse(target)