#VU75074 Improper Authentication in Assembla merge request builder - CVE-2023-30521

Vulnerability identifier: #VU75074

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-30521

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Assembla merge request builder
Web applications / Modules and components for CMS

Vendor: Jenkins

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to a lack of authentication mechanism within the webhook endpoint at /assembla-webhook/. A remote attacker can access this endpoint without authentication.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Assembla merge request builder: 1.1.1 - 1.1.13

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External links
https://www.jenkins.io/security/advisory/2023-04-12/#SECURITY-2872

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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.