CVE-2026-34241 CtrlPanel: Stored XSS in Ticket Reply Notifications Allows Session Hijacking
Stored XSS in ticket notifications allows attackers to hijack admin sessions and escalate privileges in CtrlPanel hosting billing software.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-34241?
CVE-2026-34241 is a high-severity cross-site scripting vulnerability in Ctrlpanel-gg panel, published on 19 May 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
CtrlPanel is open-source billing software for hosting providers. Versions 1.1.1 and prior contain a Stored Cross-Site Scripting (XSS) vulnerability in the ticket reply notification system. Unsanitized reply content ($newmessage) is stored directly in database notification payloads and later rendered unescaped via Blade's {!! !!} syntax in the recipient's browser. The flaw exists in both App\Notifications\Ticket\Admin\AdminReplyNotification (triggered when a user replies, targeting admins) and App\Notifications\Ticket\User\ReplyNotification (triggered when an admin replies, targeting users), allowing arbitrary JavaScript execution in the victim's session context. A low-privileged attacker can exploit this to hijack admin sessions, harvest credentials via fake login prompts or keyloggers, and escalate privileges by performing administrative actions on the victim's behalf. The reverse path also enables a malicious or compromised admin to target regular users in the same manner. This issue has been fixed in version 1.2.0.
Weakness: CWE-79
Which versions are affected by CVE-2026-34241?
How do I fix CVE-2026-34241?
No fix has been published for CVE-2026-34241 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-2026-34241 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34241 exists.
Sources
Also known as GHSA-cmrr-q3hw-3vqh.