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CVE-2024-37893

19
FAUCET Score

CVE-2024-37893 describes a multi-factor authentication (MFA) bypass vulnerability in Firefly III, a personal finance manager, specifically within its OAuth flow. This flaw allows an attacker to circumvent MFA checks, potentially gaining unauthorized access to user data if they possess the victim's username and password, which could be obtained via password spraying. The vulnerability has a CVSS score of 5.9 (MEDIUM), indicating a network-based attack with high complexity but significant potential for confidentiality impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Firefly-IiiFirefly-Iii
< 6.1.17CNA affected

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.59%
Probability of exploitation in next 30 days
EPSS Percentile
44.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 7th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: grumpydictator/firefly-iiiFixed in: 6.1.17

Vendor Advisories (1)

composerGHSA-4gm4-c4mh-4p7wmedium

Firefly III has a MFA bypass in oauth flow

Jun 17, 2024

References

github.com / firefly-iii/firefly-iii/security/advisories/GHSA-4gm4-c4mh-4p7w
owasp.org / www-community/attacks/Password_Spraying_Attack
menlosecurity.com / what-is/highly-evasive-adaptive-threats-heat/mfa-bypass