# CVE-2025-13315: Twonky Server - Improper Access Control

> Live exploitation tracking for CVE-2025-13315 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-2025-13315

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 9.3
- **Public exploit available:** Yes
- **Affected products:** Lynxtechnology Twonky Server
- **Weaknesses:** CWE-420 (Unprotected Alternate Channel)
- **Tags:** web_application

## Description

Twonky Server 8.5.2 on Linux and Windows is vulnerable to an access control flaw. An unauthenticated attacker can bypass web service API authentication controls to leak a log file and read the administrator's username and encrypted password.

## CrowdSec analysis

[CVE-2025-13315](https://euvd.enisa.europa.eu/vulnerability/CVE-2025-13315) is a critical access control vulnerability in Twonky Server 8.5.2 for Linux and Windows, allowing unauthenticated attackers to bypass API authentication and access sensitive log files. This exposure can lead to the disclosure of the administrator's username and encrypted password, potentially enabling further compromise of the server.

CrowdSec has been tracking this vulnerability and its exploits since 10th of December 2025.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2025-13315 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting.
Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2025-13315 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2025-13315 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Attackers exploit unauthenticated access to the `/nmc/rpc/log_getfile` endpoint to retrieve Twonky Server log files, exposing administrator usernames and encrypted passwords.

## Timeline

- 2025-11-19: CVE Published. CVE-2025-13315 is published to NVD.
- 2025-12-10: Rule Released. CrowdSec releases a rule to detect CVE-2025-13315 exploitation attempts against the CrowdSec Network.
- 2025-12-15: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2025-13315 for the first time.

## References

- https://www.rapid7.com/blog/post/cve-2025-13315-cve-2025-13316-critical-twonky-server-authentication-bypass-not-fixed/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-13315.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2025-13315) follows observed exploitation activity for CVE-2025-13315. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.