CVE-2026-48221 Open ISES Tickets < 3.44.2 Reflected XSS via ics205a.php frm_add_str Parameter
Authenticated attackers can inject arbitrary JavaScript via the frm_add_str parameter in Open ISES Tickets, leading to script execution in victim browsers.
- 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-2026-48221?
CVE-2026-48221 is a medium-severity cross-site scripting vulnerability in Open ISES Tickets, published on 21 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
Open ISES Tickets before 3.44.2 contains a reflected cross-site scripting vulnerability in ics205a.php that allows authenticated attackers to inject arbitrary JavaScript by passing an unsanitized value through the frm_add_str POST parameter directly into an HTML form hidden input value attribute. Attackers can craft a malicious request containing a JavaScript payload that executes in the victim's browser when the response is rendered.
Weakness: CWE-79
Which versions are affected by CVE-2026-48221?
How do I fix CVE-2026-48221?
No fix has been published for CVE-2026-48221 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-2026-48221 being exploited?
There is no known exploitation of CVE-2026-48221 in the wild and no public exploit code.
Sources
Also known as GHSA-cxv4-2vhg-j9gf.