CVE-2026-16074 in AstrBot
Summary
by MITRE • 07/18/2026
A vulnerability was detected in AstrBotDevs AstrBot up to 4.25.2. This affects the function update_plugin/update_all_plugins of the file astrbot/dashboard/routes/plugin.py of the component Plugin Update Handler. The manipulation of the argument download_url/download_urls/proxy results in server-side request forgery. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 07/18/2026
This vulnerability resides within the AstrBotDevs AstrBot platform version 4.25.2 and earlier, specifically targeting the plugin update functionality exposed through the dashboard interface. The flaw exists in the Plugin Update Handler component where the update_plugin and update_all_plugins functions process user-supplied download URLs without adequate validation or sanitization. This represents a classic server-side request forgery vulnerability that allows remote attackers to manipulate the update process by providing malicious URL inputs. The attack vector is particularly dangerous because it can be executed entirely from external systems without requiring local access or authentication, making it highly exploitable in automated attack scenarios.
The technical implementation of this vulnerability stems from insufficient input validation within the plugin update mechanism where the application directly uses user-provided download_url, download_urls, or proxy parameters without proper sanitization. This allows attackers to craft malicious URLs that could potentially redirect the application to internal network resources or external malicious servers. The vulnerability enables attackers to perform unauthorized requests from the server hosting AstrBot, potentially exposing internal systems, bypassing firewalls, or accessing restricted resources that would normally be protected by network segmentation. Such a flaw aligns with CWE-918 Server-Side Request Forgery and represents a critical security gap in the application's architecture.
The operational impact of this vulnerability extends beyond simple data exfiltration or unauthorized access to encompass potential system compromise and network reconnaissance capabilities. Attackers could leverage this vulnerability to scan internal networks, probe for additional vulnerabilities, or establish persistence mechanisms through malicious plugin updates. The public availability of exploitation tools significantly amplifies the risk as it removes the requirement for advanced technical skills to exploit the flaw. Organizations using AstrBot versions up to 4.25.2 face substantial risk of unauthorized access and potential data breaches when this vulnerability is actively exploited in the wild.
Mitigation strategies should focus on immediate patching of the affected software version, implementing strict input validation for all URL parameters, and establishing network-level restrictions that prevent outbound requests to internal resources from the AstrBot server. Organizations should also consider implementing web application firewalls with rules specifically designed to detect and block suspicious URL patterns, and conduct thorough network segmentation to limit potential damage from successful exploitation attempts. Additionally, monitoring for unusual outbound connections from the AstrBot service and implementing robust logging of plugin update activities will aid in early detection of exploitation attempts. The vulnerability demonstrates the importance of validating all external inputs and follows ATT&CK technique T1071.004 Application Layer Protocol: DNS to maintain operational security while conducting reconnaissance activities.