CVE-2022-38845 in EspoCRM
Summary
by MITRE • 09/16/2022
Cross Site Scripting in Import feature in EspoCRM 7.1.8 allows remote users to run malicious JavaScript in victim s browser via sending crafted csv file containing malicious JavaScript to authenticated user. Any authenticated user importing the crafted CSV file may end up running the malicious JavaScripting in the browser.
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Analysis
by VulDB Data Team • 10/19/2022
CVE-2022-38845 represents a cross site scripting vulnerability within the import functionality of EspoCRM version 7.1.8 that enables remote attackers to execute malicious javascript code in the browsers of authenticated users. This vulnerability exists in the csv import feature where users can upload csv files containing data to be imported into the system. The flaw occurs when the application fails to properly sanitize or escape user-supplied data during the import process, allowing malicious javascript payloads to be embedded within the csv file itself. When an authenticated user attempts to import a crafted csv file containing malicious javascript code, the system processes the data without adequate validation, resulting in the execution of the malicious script within the user's browser context. This type of vulnerability falls under CWE-79 which specifically addresses cross site scripting flaws in web applications. The attack vector is particularly concerning because it requires only that a victim with valid authentication credentials import a malicious file, making it a significant threat in environments where users have administrative privileges or access to sensitive data. The vulnerability enables attackers to perform various malicious activities including session hijacking, data exfiltration, credential theft, and redirection to malicious websites. From an operational perspective, this vulnerability compromises the integrity of the application's data import functionality and poses a risk to all authenticated users who may inadvertently import compromised files. The attack chain typically involves an attacker crafting a malicious csv file containing javascript payloads, then persuading or forcing a victim user to import the file through social engineering or by compromising the user's system. The impact extends beyond simple script execution as it can lead to complete compromise of user sessions and potential lateral movement within the organization's network. The vulnerability aligns with ATT&CK technique T1059.007 which covers scripting through web shells and malicious file uploads. Organizations should immediately implement proper input validation and output encoding mechanisms to prevent such attacks, including sanitizing all imported data, implementing strict file format validation, and restricting import permissions to trusted users only. Additionally, regular security updates and patches should be applied to ensure the latest security measures are in place to protect against similar vulnerabilities in the future.