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CVE-2024-37893— MFA bypass in oauth flow in Firefly III

Quick assessment

Affected
firefly-iii firefly-iii
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Firefly III是一套开源的个人财务管理系统。 Firefly III 6.1.17之前版本存在安全漏洞，该漏洞源于可能允许恶意用户绕过多重身份验证检查。

CVSS 5.9 · Medium EPSS 0.59% · P46
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I. Basic Information for CVE-2024-37893

Vulnerability Information
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Vulnerability Title
MFA bypass in oauth flow in Firefly III
Source: CVE Program / CVE List V5
Vulnerability Description
Firefly III is a free and open source personal finance manager. In affected versions an 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 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. This problem has been patched in Firefly III v6.1.17 and up. Users are advised to upgrade. Users unable to upgrade should Use a unique password for their Firefly III instance and store their password securely, i.e. in a password manager.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Firefly III 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Firefly III是一套开源的个人财务管理系统。 Firefly III 6.1.17之前版本存在安全漏洞，该漏洞源于可能允许恶意用户绕过多重身份验证检查。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
firefly-iii firefly-iii < 6.1.17 -

II. Public POCs for CVE-2024-37893

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III. Intelligence Information for CVE-2024-37893

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Vendor Advisories for CVE-2024-37893 (1)

Security Blog Posts for CVE-2024-37893 (1)

Other References for CVE-2024-37893 (1)

IV. Related Vulnerabilities

Same product: firefly-iii
Same vendor: firefly-iii
Same weakness: CWE-287

V. Comments for CVE-2024-37893

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