CVE-2025-42896 Overview
CVE-2025-42896 is a Server-Side Request Forgery (SSRF) vulnerability in SAP BusinessObjects Business Intelligence Platform. The flaw resides in a URL parameter that controls the login page error message. An unauthenticated remote attacker can send crafted requests that cause the server to fetch attacker-supplied URLs.
Successful exploitation results in low impact to confidentiality and integrity, with no impact to availability. The vulnerability requires user interaction, as an authorized user must trigger the crafted link. SAP addressed the issue on Security Patch Day and published guidance under SAP Note #3651390.
Critical Impact
Unauthenticated attackers can coerce the SAP BusinessObjects server to issue outbound HTTP requests to arbitrary URLs, enabling reconnaissance of internal services and limited data disclosure.
Affected Products
- SAP BusinessObjects Business Intelligence Platform
Discovery Timeline
- 2025-12-09 - CVE-2025-42896 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-42896
Vulnerability Analysis
The vulnerability is classified under [CWE-116] Improper Encoding or Escaping of Output. It affects the login page workflow of SAP BusinessObjects Business Intelligence Platform, specifically a URL parameter used to render the error message displayed to end users.
Because the parameter is not properly validated or restricted, an attacker can inject an arbitrary URL. When a user interacts with the crafted request, the server processes the parameter and initiates an outbound fetch to the attacker-controlled destination. This behavior matches classic Server-Side Request Forgery (SSRF) semantics.
The attack is network-reachable and requires no authentication, but user interaction is required. This constraint places the attack pattern close to phishing-assisted SSRF, where a victim must load the malicious link.
Root Cause
The root cause is improper output encoding and insufficient input validation on the URL parameter driving the login error message. The application accepts a URL value and uses it to trigger a server-side request without enforcing an allowlist of trusted destinations or sanitizing the scheme and host.
Attack Vector
An attacker crafts a URL to the SAP BusinessObjects login page that embeds an attacker-controlled host in the vulnerable parameter. The attacker delivers the link through phishing or embedded content. When the victim opens the link, the server issues a request to the attacker-supplied URL.
The attacker can use this behavior to probe internal network resources, retrieve metadata from adjacent services, or exfiltrate limited information reflected back through error messages. Public proof-of-concept exploit code has not been observed at the time of publication.
Refer to SAP Note #3651390 and the SAP Security Patch Day advisory for technical details specific to the affected components.
Detection Methods for CVE-2025-42896
Indicators of Compromise
- Outbound HTTP or HTTPS connections originating from the SAP BusinessObjects application server to unfamiliar external hosts.
- Web server access logs containing login page requests with URL parameters holding fully qualified external URLs.
- Unusual DNS resolution requests from the BusinessObjects host to attacker-controlled or cloud metadata endpoints.
Detection Strategies
- Inspect HTTP request logs on the BusinessObjects front-end for query parameters containing http:// or https:// schemes tied to the login error message endpoint.
- Correlate inbound requests to the login page with subsequent outbound network flows from the same server process.
- Alert on server-initiated requests to RFC1918, link-local (169.254.169.254), or non-approved external destinations.
Monitoring Recommendations
- Enable verbose logging on the SAP BusinessObjects web tier and forward events to a centralized analytics platform for retention and search.
- Monitor egress traffic from application servers using network detection tools that flag anomalous outbound HTTP requests.
- Baseline normal outbound destinations for the BusinessObjects host and alert on deviations.
How to Mitigate CVE-2025-42896
Immediate Actions Required
- Apply the fixes referenced in SAP Note #3651390 released during SAP Security Patch Day.
- Inventory all instances of SAP BusinessObjects Business Intelligence Platform exposed to untrusted networks and prioritize patching.
- Review recent web server logs for suspicious login page requests containing external URLs in parameters.
Patch Information
SAP published the corrective guidance in SAP Note #3651390. Administrators must authenticate to the SAP for Me portal to retrieve the patch details and apply the fix to affected BusinessObjects deployments. Additional context is available on the SAP Security Patch Day page.
Workarounds
- Restrict external access to the SAP BusinessObjects login page using a reverse proxy or web application firewall (WAF) rule that blocks requests containing URL values in the vulnerable parameter.
- Implement egress filtering on the BusinessObjects application server to prevent outbound connections to unapproved destinations, including cloud metadata endpoints.
- Educate users to avoid clicking untrusted links pointing to the BusinessObjects login page while patching is scheduled.
# Example WAF rule concept to block external URL schemes in the login error parameter
# Adjust the parameter name to match your deployment before enforcement
SecRule ARGS:errorMessageParam "@rx ^(https?|ftp)://" \
"id:1420896,phase:2,deny,status:400,log,msg:'CVE-2025-42896 SSRF attempt blocked'"
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