SB2021101102 - Multiple vulnerabilities in Firefly III

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Open redirect (CVE-ID: N/A)

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the authenticated victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

2) Arbitrary file upload (CVE-ID: N/A)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload while creating a new bill. A remote attacker can upload a malicious file and execute it on the server.

Remediation

Install update from vendor's website.

References

• https://github.com/firefly-iii/firefly-iii/releases/tag/5.6.2
• https://huntr.dev/bounties/549a1040-9b5e-420b-9b80-20700dd9d592/
• https://huntr.dev/bounties/5267ec1c-d204-40d2-bd4f-6c2dd495ee18/