CVE-2023-5653 in WassUp Real Time Analytics Plugin
Summary
by MITRE • 11/27/2023
The WassUp Real Time Analytics WordPress plugin through 1.9.4.5 does not escape IP address provided via some headers before outputting them back in an admin page, allowing unauthenticated users to perform Stored XSS attacks against logged in admins
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Analysis
by VulDB Data Team • 12/17/2023
The vulnerability identified as CVE-2023-5653 affects the WassUp Real Time Analytics WordPress plugin version 1.9.4.5 and earlier, presenting a critical security risk through stored cross-site scripting exploitation. This flaw exists within the plugin's handling of IP address data sourced from HTTP headers, specifically failing to properly sanitize or escape these values before rendering them in administrative interfaces. The vulnerability operates under CWE-79 which categorizes improper neutralization of input during web page generation, making it a classic stored XSS vector. Attackers can leverage this weakness by crafting malicious IP addresses in headers that are subsequently processed by the plugin and displayed in admin pages, creating persistent XSS payloads that execute against authenticated administrators.
The technical implementation of this vulnerability stems from the plugin's inadequate input validation and output escaping mechanisms. When the plugin processes incoming HTTP requests, it extracts IP addresses from various headers such as X-Forwarded-For or X-Real-IP, storing these values in its database or processing them for display in administrative dashboards. The absence of proper sanitization means that any maliciously crafted IP addresses containing HTML or JavaScript code can be stored and later executed when administrators view the affected pages. This creates a persistent threat where the malicious payload remains active until the plugin is updated or the affected data is manually removed from the database. The vulnerability is particularly dangerous because it requires no authentication from the attacker, as the malicious data can be injected through legitimate header manipulation during normal traffic flow.
The operational impact of CVE-2023-5653 extends beyond simple XSS exploitation, as it provides attackers with a potential foothold for more sophisticated attacks within compromised WordPress environments. When administrators view the plugin's administrative pages, the stored XSS payloads can execute in their browser context, potentially allowing attackers to steal session cookies, perform actions on behalf of administrators, or redirect users to malicious sites. This vulnerability directly maps to ATT&CK technique T1566.001 which involves the exploitation of web applications through cross-site scripting attacks. The attack surface is particularly concerning given that WordPress plugins often have elevated privileges and access to sensitive system information, making successful exploitation potentially devastating for affected organizations.
Mitigation strategies for CVE-2023-5653 should prioritize immediate plugin updates to versions that address the XSS vulnerability, as the vendor has likely released patches containing proper input sanitization and output escaping mechanisms. Organizations should implement network-level protections such as web application firewalls that can detect and block malicious header values, though this represents a temporary workaround rather than a permanent solution. Additionally, administrators should conduct thorough audits of their plugin installations to identify any other vulnerable components that might share similar input handling patterns, as this vulnerability type often indicates broader security gaps in the application's data processing pipeline. The remediation process must include comprehensive testing of the updated plugin to ensure that the XSS mitigation does not introduce functional regressions in the analytics reporting capabilities that administrators rely upon for monitoring their website traffic patterns.