Authorization code theft via userinfo redirect URI
Published Apr 21, 2025 · Updated Apr 21, 2025
OAuth redirect validation bypass in Sonos Control API through 2025-04-21 allows remote attackers to steal authorization codes. The /login/v3/oauth endpoint treats a registered host placed in the URL userinfo field as valid while the authority resolves to an attacker-controlled host. Exploitation requires a victim to follow the crafted authorization link, authenticate, and approve playback-control-all access; the stolen code enables token exchange when the client secret is available.
Summary
What happened
OAuth redirect validation bypass in Sonos Control API through 2025-04-21 allows remote attackers to steal authorization codes. The /login/v3/oauth endpoint treats a registered host placed in the URL userinfo field as valid while the authority resolves to an attacker-controlled host. Exploitation requires a victim to follow the crafted authorization link, authenticate, and approve playback-control-all access; the stolen code enables token exchange when the client secret is available.
The record
- CVE
- CVE-2025-43916
- Published
- Apr 21, 2025
- Updated
- Apr 21, 2025
- Vendor
- Sonos
- Product
- Sonos Control API
- Classifications
- CWE-647, T1528
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 21, 2025CVE publishedPublication date reported by the CVE source.
- Apr 21, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=2025-04-21
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Sonos OAuth redirect URI bypass demonstrationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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