Unauthorized WebPush messages via omitted VAPID key
Published Dec 19, 2023 · Updated Feb 13, 2025
Authorization bypass in Firefox for Android before 121 allows remote attackers to send empty WebPush messages without a valid VAPID key. WebPushEngineIntegration fails to pass the subscription's application-server key, causing Fenix to return an unsigned v1 endpoint instead of a VAPID-bound v2 endpoint. The attacker must obtain the private push endpoint and encryption keys; the demonstrated result is an unauthorized empty notification, not data disclosure or code execution.
Summary
What happened
Authorization bypass in Firefox for Android before 121 allows remote attackers to send empty WebPush messages without a valid VAPID key. WebPushEngineIntegration fails to pass the subscription's application-server key, causing Fenix to return an unsigned v1 endpoint instead of a VAPID-bound v2 endpoint. The attacker must obtain the private push endpoint and encryption keys; the demonstrated result is an unauthorized empty notification, not data disclosure or code execution.
The record
- CVE
- CVE-2023-6868
- Published
- Dec 19, 2023
- Updated
- Feb 13, 2025
- Vendor
- Mozilla
- Product
- Firefox
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 19, 2023CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <121
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
No sourced classifications are available.
Public exploit references
- wpn.tar.gz WebPush demonstrationproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo