Vulnerability identifier: #VU50949

Vulnerability risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-21621

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Support Core
Web applications / Modules and components for CMS

Vendor: Jenkins

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the affected plugin provides the serialized user authentication as part of the "About user (basic authentication details only)" information (user.md). A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Support Core: 1.0 - 2.72

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External links
http://www.jenkins.io/security/advisory/2021-02-24/#SECURITY-2150

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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.