#VU50249 Command Injection in RSSHub - CVE-2021-21278

Vulnerability identifier: #VU50249

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-21278

CWE-ID: CWE-77

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
RSSHub
Web applications / Modules and components for CMS

Vendor: DIYgod

Description

The vulnerability allows a remote attacker to execute arbitrary commands on the target system.

The vulnerability exists due to improper input validation. A remote attacker can pass specially crafted data to the application and execute arbitrary commands on the target system.

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

Vulnerable software versions

RSSHub: All versions

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External links
https://github.com/DIYgod/RSSHub/commit/7f1c43094e8a82e4d8f036ff7d42568fed00699d
https://github.com/DIYgod/RSSHub/security/advisories/GHSA-pgjj-866w-fc5c
https://www.npmjs.com/package/rsshub

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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.