Description Preview
A cross-site scripting (XSS) vulnerability has been identified in Plesk Onyx 17.8.11. This vulnerability allows remote unauthenticated attackers to inject arbitrary JavaScript, HTML, or CSS code through GET parameters. When a victim accesses a specially crafted URL, the injected code executes within their browser in the context of the vulnerable Plesk application. This can lead to cookie theft, session hijacking, credential harvesting, or other client-side attacks against Plesk administrators and users.
Overview
CVE-2020-11584 is a reflected XSS vulnerability affecting Plesk Onyx 17.8.11 and potentially Plesk Obsidian. The vulnerability exists because the application does not properly validate or sanitize user-supplied input in certain GET parameters. When this malicious input is reflected back in the response, it executes in the victim's browser. Since the vulnerability can be exploited without authentication, it presents a significant risk to Plesk installations that are accessible from the internet. Successful exploitation could allow attackers to steal session cookies, capture credentials, or perform actions with the privileges of the victim user.
Remediation
To address this vulnerability, system administrators should:
- Update Plesk to the latest version that contains patches for this vulnerability
- If immediate patching is not possible, consider implementing web application firewall (WAF) rules to filter potentially malicious requests containing XSS payloads
- Limit access to the Plesk admin interface to trusted IP addresses only
- Implement Content Security Policy (CSP) headers to mitigate the impact of XSS attacks
- Educate users about the risks of clicking on suspicious links, especially those pointing to Plesk administration interfaces
References
- https://medium.com/%400x00crash/xss-reflected-in-plesk-onyx-and-obsidian-1173a3eaffb5
- https://cwe.mitre.org/data/definitions/79.html (CWE-79: Improper Neutralization of Input During Web Page Generation)
Industry ExposureMost to leastThis section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
- Accommodation & Food ServicesAccommodation & Food Services
- Administrative, Support, Waste Management & Remediation ServicesAdministrative, Support, Waste Management & Remediation Services
- Agriculture, Forestry Fishing & HuntingAgriculture, Forestry Fishing & Hunting
- Arts, Entertainment & RecreationArts, Entertainment & Recreation
- ConstructionConstruction
- Educational ServicesEducational Services
- Finance and InsuranceFinance and Insurance
- Health Care & Social AssistanceHealth Care & Social Assistance
- InformationInformation
- Management of Companies & EnterprisesManagement of Companies & Enterprises
- ManufacturingManufacturing
- MiningMining
- Other Services (except Public Administration)Other Services (except Public Administration)
- Professional, Scientific, & Technical ServicesProfessional, Scientific, & Technical Services
- Public AdministrationPublic Administration
- Real Estate Rental & LeasingReal Estate Rental & Leasing
- Retail TradeRetail Trade
- Transportation & WarehousingTransportation & Warehousing
- UtilitiesUtilities
- Wholesale TradeWholesale Trade
