CVE-2021-20397 Cross-site scripting in QRadar SIEM
Attackers can inject JavaScript into the IBM QRadar SIEM web interface to steal credentials from trusted sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-20397?
CVE-2021-20397 is a medium-severity cross-site scripting vulnerability in Ibm Qradar Security Information and Event Manager, published on 5 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 SIEM 7.3 and 7.4 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. IBM X-Force ID: 196017.
Weakness: CWE-79
Which versions are affected by CVE-2021-20397?
It affects 1 product.
Products include Ibm Qradar Security Information and Event Manager.
How do I fix CVE-2021-20397?
No fix has been published for CVE-2021-20397 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-2021-20397 being exploited?
There is no known exploitation of CVE-2021-20397 in the wild and no public exploit code.
Other vulnerabilities in Ibm Qradar Security Information and Event Manager
- CVE-2019-4210 Auth bypass in QRadar SIEM
- CVE-2014-3062 Code injection in n/a
- CVE-2025-33117 IBM QRadar SIEM command execution
- CVE-2020-4512 Command injection in QRadar SIEM
- CVE-2015-2011 Command injection in n/a
All Ibm Qradar Security Information and Event Manager vulnerabilities
Sources
Also known as GHSA-pv6g-wrhh-xffr.