CVE-2025-57305 Overview
CVE-2025-57305 is a Server-Side Request Forgery (SSRF) vulnerability affecting VitaraCharts version 5.3.5. The flaw resides in the fileLoader.jsp endpoint, which fails to validate user-supplied URLs before issuing server-side HTTP requests. Attackers can abuse this behavior to force the vulnerable server to fetch arbitrary internal or external resources. The vulnerability maps to CWE-918: Server-Side Request Forgery and is network-exploitable without authentication. Successful exploitation exposes internal services, metadata endpoints, and network topology to unauthenticated remote attackers.
Critical Impact
Unauthenticated attackers can coerce the VitaraCharts server into making arbitrary HTTP requests, enabling internal network reconnaissance and access to services behind the network perimeter.
Affected Products
- VitaraCharts 5.3.5
- Deployments embedding fileLoader.jsp from the affected release
- Applications integrating VitaraCharts as a charting component
Discovery Timeline
- 2025-10-02 - CVE-2025-57305 published to NVD
- 2026-07-05 - Last updated in NVD database
Technical Details for CVE-2025-57305
Vulnerability Analysis
The vulnerability exists in the fileLoader.jsp component of VitaraCharts 5.3.5. This JSP endpoint accepts a URL parameter and performs a server-side HTTP fetch on behalf of the requesting client. The application does not enforce allowlists, blocklists, or scheme restrictions on the supplied URL. An attacker submits a crafted request pointing to an internal address, and the server executes the request from its own trust context. Responses can reveal internal service banners, configuration data, and cloud instance metadata.
The CWE-918 classification confirms the root category as SSRF. Because the flaw is reachable pre-authentication over the network, exploitation requires only HTTP access to the affected endpoint.
Root Cause
The root cause is missing validation of user-controlled URLs before the server-side fetch. fileLoader.jsp treats the input as trusted and issues an outbound request without checking the target host, scheme, or destination network range. No egress filtering is applied within the application layer.
Attack Vector
An unauthenticated remote attacker sends an HTTP request to fileLoader.jsp with a URL parameter targeting an internal resource such as http://169.254.169.254/, http://localhost:8080/, or an internal RFC1918 host. The server retrieves the resource and may return the response body, headers, or error details to the attacker. Attackers can enumerate internal services, retrieve cloud provider metadata, and pivot toward internal APIs that trust the server's IP address.
Refer to the Mattz Blog CVE-2025-57305 Analysis for reproduction details.
Detection Methods for CVE-2025-57305
Indicators of Compromise
- HTTP requests to fileLoader.jsp containing URL parameters pointing to internal, loopback, or link-local addresses.
- Outbound connections from the VitaraCharts host to cloud metadata endpoints such as 169.254.169.254.
- Unexpected access patterns to internal services originating from the application server IP.
- Repeated fileLoader.jsp requests iterating through port numbers or hostnames, indicating internal scanning.
Detection Strategies
- Deploy web application firewall rules that inspect and reject fileLoader.jsp requests referencing private IP ranges, loopback, or metadata addresses.
- Analyze web server access logs for anomalous URL parameters submitted to fileLoader.jsp.
- Correlate outbound network flows from the VitaraCharts host against expected destinations and flag deviations.
Monitoring Recommendations
- Enable verbose logging of query parameters on JSP endpoints, ensuring URL values are captured for audit.
- Alert on any outbound HTTP request from the VitaraCharts server to link-local, private, or cloud metadata ranges.
- Track process-level network telemetry to attribute unexpected egress traffic to the JSP handler.
How to Mitigate CVE-2025-57305
Immediate Actions Required
- Restrict network access to fileLoader.jsp to trusted internal users only, using authentication or IP allowlisting at the reverse proxy.
- Block the VitaraCharts server from initiating outbound connections to RFC1918, loopback, and cloud metadata addresses via host or network firewall rules.
- Audit application logs for prior exploitation attempts targeting fileLoader.jsp.
Patch Information
No vendor advisory URL is listed in the NVD entry at the time of publication. Administrators should monitor VitaraCharts vendor channels for a fixed release and apply upgrades once available. Consult the Mattz Blog CVE-2025-57305 Analysis for current status.
Workarounds
- Place VitaraCharts behind a reverse proxy that strips or validates URL parameters submitted to fileLoader.jsp.
- Deploy an egress proxy that enforces an allowlist of permitted destinations for the application server.
- Disable or remove fileLoader.jsp if the file-loading feature is not required by the deployment.
# Example iptables rules blocking metadata and private ranges from the app server
iptables -A OUTPUT -d 169.254.169.254 -j REJECT
iptables -A OUTPUT -d 10.0.0.0/8 -p tcp --dport 80 -j REJECT
iptables -A OUTPUT -d 172.16.0.0/12 -p tcp --dport 80 -j REJECT
iptables -A OUTPUT -d 192.168.0.0/16 -p tcp --dport 80 -j REJECT
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
