CVE-2024-37893
Firefly III has a MFA bypass in oauth flow
Description
### Impact A MFA bypass in the Firefly III OAuth flow may allow malicious users to bypass the MFA-check. This allows malicious users to use password spraying to gain access to your Firefly III data using passwords stolen from other sources. As OAuth applications are easily enumerable using an incrementing id, an attacker could try sign an OAuth application up to a users profile quite easily if they have created one. The attacker would also need to know the victims username and password. ### Patches Problem has been patched in Firefly III v6.1.17 and up. ### Workarounds - Use a unique password for your Firefly III instance, - Store your password securely, i.e. in a password manager or in your head. ### References - https://owasp.org/www-community/attacks/Password_Spraying_Attack - https://www.menlosecurity.com/what-is/highly-evasive-adaptive-threats-heat/mfa-bypass
How to fix CVE-2024-37893
To remediate CVE-2024-37893, upgrade the affected package to a fixed version below.
- —upgrade to 6.1.17 or later
Is CVE-2024-37893 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 6.1.17
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |