CVE-2026-21730 Stored XSS in Verba
An attacker can inject malicious scripts via the login username field, which execute in the administrator's browser when viewing logs.
- 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-2026-21730?
CVE-2026-21730 is a medium-severity cross-site scripting vulnerability in Verint Verba, published on 14 May 2026. 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
Verba is affected by a Stored Cross-Site Scripting (XSS) vulnerability within its login logging mechanism. When an unauthenticated remote attacker attempts to log in using an incorrect username and password combination, the supplied username value is recorded in the application logs. Due to lack of input sanitization, an attacker can inject a malicious XSS payload into the username field. This payload will be executed in the context of the administrator’s browser when the admin accesses the web application's log viewer.
The vendor was notified early about this vulnerability, but didn't respond to our messages. This issue was fixed in version 10.0.6
Weakness: CWE-79
Which versions are affected by CVE-2026-21730?
It affects 1 product.
Products include Verint Verba Collaboration Compliance and Quality Management Platform.
How do I fix CVE-2026-21730?
No fix has been published for CVE-2026-21730 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-2026-21730 being exploited?
There is no known exploitation of CVE-2026-21730 in the wild and no public exploit code.
Other vulnerabilities in Verint Verba
Sources
Also known as GHSA-pqwf-7gjw-fvph.