Sonos api.sonos.com up to 2025-04-21 RFC 6819 /login/v3/oauth redirect_uri non-canonical url paths for authorization decisions

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Sonos api.sonos.com up to 2025-04-21. It has been classified as problematic. Affected by this issue is some unknown functionality of the file /login/v3/oauth of the component RFC 6819 Handler. This manipulation of the argument redirect_uri causes use of non-canonical url paths for authorization decisions. The identification of this vulnerability is CVE-2025-43916. It is possible to initiate the attack remotely. There is no exploit available. This product operates as a managed service, which prevents users from maintaining vulnerability countermeasures themselves.

Detailsinfo

A vulnerability has been found in Sonos api.sonos.com up to 2025-04-21 and classified as problematic. Affected by this vulnerability is an unknown code block of the file /login/v3/oauth of the component RFC 6819 Handler. The manipulation of the argument redirect_uri with an unknown input leads to a use of non-canonical url paths for authorization decisions vulnerability. The CWE definition for the vulnerability is CWE-647. The product defines policy namespaces and makes authorization decisions based on the assumption that a URL is canonical. This can allow a non-canonical URL to bypass the authorization. As an impact it is known to affect integrity. The summary by CVE is:

Sonos api.sonos.com through 2025-04-21, when the /login/v3/oauth endpoint is used, accepts a redirect_uri containing userinfo in the authority component, which is not consistent with RFC 6819 section 5.2.3.5. An authorization code may be sent to an attacker-controlled destination. This might have further implications in conjunction with "Decompiling the app revealed a hardcoded secret."

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-43916 since 04/19/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/25/2025).

This product is available as a managed service. Users are not able to maintain vulnerability countermeasures themselves.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-12378). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

Managed Service

  • yes

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.2
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 3.4
CNA Vector (MITRE): 🔍

CVSSv2info

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

Exploitinginfo

Class: Use of non-canonical url paths for authorization decisions
CWE: CWE-647
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

Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/19/2025 🔍
04/21/2025 +2 days 🔍
04/21/2025 +0 days 🔍
05/25/2025 +34 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2025-43916 (🔍)
GCVE (CVE): GCVE-0-2025-43916
GCVE (VulDB): GCVE-100-305779
EUVD: 🔍

Entryinfo

Created: 04/21/2025 16:18
Updated: 05/25/2025 20:39
Changes: 04/21/2025 16:18 (65), 05/25/2025 20:39 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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