#VU52043 Cross-site scripting in Sidekiq - CVE-2021-30151

Vulnerability identifier: #VU52043

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-30151

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

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

Vendor: Mike Perham

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the queue name of the live-poll feature. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Sidekiq: 5.0.0 - 5.0.5, 5.1.0 - 5.1.3, 6.0.0 - 6.0.7, 6.1.0 - 6.1.3, 6.2.0

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External links
https://github.com/mperham/sidekiq/issues/4852
https://github.com/mperham/sidekiq/commit/64f70339d1dcf50a55c00d36bfdb61d97ec63ed8

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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.