CVE-2021-20392 Cross-site scripting in QRadar SIEM

What is CVE-2021-20392?

CVE-2021-20392 is a medium-severity cross-site scripting vulnerability in IBM QRadar SIEM, published on 14 May 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

IBM QRadar User Behavior Analytics 1.0.0 through 4.0.1 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.

Weakness: CWE-79

Which versions are affected by CVE-2021-20392?

It affects 1 product.

Products include Ibm Qradar User Behavior Analytics.

How do I fix CVE-2021-20392?

No fix has been published for CVE-2021-20392 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-20392 being exploited?

There is no known exploitation of CVE-2021-20392 in the wild and no public exploit code.

Other vulnerabilities in IBM QRadar SIEM

• CVE-2021-20393 Information disclosure in QRadar SIEM Medium 5.3
• CVE-2022-36771 Information disclosure in QRadar User Behavior Analytics Medium 4.3
• CVE-2021-29757 Cross-site request forgery in QRadar User Behavior Analytics Medium 4.3
• CVE-2021-20391 Information disclosure in QRadar SIEM Medium 4.0
• CVE-2021-20429 Information disclosure in QRadar SIEM Low 3.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-fvm4-pf5q-h76x.