Lynxtechnology Twonky Server 8.5.2 Web Service API unprotected alternate channel

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in Lynxtechnology Twonky Server 8.5.2 and classified as critical. Affected by this issue is some unknown functionality of the component Web Service API. The manipulation leads to unprotected alternate channel. This vulnerability is listed as CVE-2025-13315. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Lynxtechnology Twonky Server 8.5.2. This issue affects an unknown part of the component Web Service API. The manipulation with an unknown input leads to a unprotected alternate channel vulnerability. Using CWE to declare the problem leads to CWE-420. The product protects a primary channel, but it does not use the same level of protection for an alternate channel. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented by Ryan Emmons. The advisory is shared at rapid7.com. The identification of this vulnerability is CVE-2025-13315 since 11/17/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/03/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Unprotected alternate channel
CWE: CWE-420 / CWE-419
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

11/17/2025 CVE reserved
11/19/2025 +2 days Advisory disclosed
11/19/2025 +0 days VulDB entry created
12/03/2025 +14 days VulDB entry last update

Sourcesinfo

Advisory: rapid7.com
Researcher: Ryan Emmons
Status: Not defined

CVE: CVE-2025-13315 (🔒)
GCVE (CVE): GCVE-0-2025-13315
GCVE (VulDB): GCVE-100-332993

Entryinfo

Created: 11/19/2025 19:52
Updated: 12/03/2025 06:24
Changes: 11/19/2025 19:52 (66), 12/03/2025 06:24 (11)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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