Vulnerability identifier: #VU53689

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33563

CWE-ID: CWE-307

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
koel
Web applications / Other software

Vendor: Koel

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the authentication mechanism has no brute-force prevention. A remote attacker can cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

koel: 1.1.1 - 5.1.3

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External links
http://github.com/koel/koel/releases/tag/v5.1.4
http://huntr.dev/bounties/1-other-koel/koel/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.