# CVE-2025-15503: Sangfor OSM - Arbitrary File Upload

> Live exploitation tracking for CVE-2025-15503 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2025-15503

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** Sangfor OSM
- **Weaknesses:** CWE-434 (Unrestricted Upload of File with Dangerous Type)
- **Tags:** management_panel

## Description

Sangfor Operation and Maintenance Management System contains an unrestricted file upload vulnerability caused by manipulation of the File argument in /fort/trust/version/common/common.jsp, letting remote attackers upload arbitrary files. The exploit requires no special privileges.

## CrowdSec analysis

[CVE-2025-15503](https://euvd.enisa.europa.eu/vulnerability/CVE-2025-15503) is a critical arbitrary file upload vulnerability in Sangfor Operation and Maintenance Management System (OSM) versions up to 3.0.8. Due to missing file type validation on the upload endpoint, unauthenticated remote attackers can upload malicious files such as JSP web shells, leading to full remote code execution and system compromise.

CrowdSec has been tracking this vulnerability and its exploits since 1st of March 2025.

Data from the CrowdSec community indicates that exploitation of CVE-2025-15503 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations.
Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2025-15503 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2025-15503 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Attackers exploit the `/fort/trust/version/common/common.jsp` endpoint by sending multipart POST requests with malicious JSP files, which are then accessible on the server for remote code execution.

## Timeline

- 2025-03-01: CVE Published. CVE-2025-15503 is published to NVD.
- 2025-03-01: Rule Released. CrowdSec releases a rule to detect CVE-2025-15503 exploitation attempts against the CrowdSec Network.
- 2026-03-27: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2025-15503 for the first time.

## References

- https://nvd.nist.gov/vuln/detail/CVE-2025-15503
- https://github.com/advisories/GHSA-h49h-jpp7-xv85
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-15503.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2025-15503) follows observed exploitation activity for CVE-2025-15503. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.