# 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.

- **Severity:** High 8.7 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N`)
- **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 available:** No
- **Published:** 19 May 2026
- **Updated:** 20 May 2026
- **Also known as:** GHSA-cmrr-q3hw-3vqh

## 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 (Improper Neutralization of Input During Web Page Generation)

## 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.

## Is CVE-2026-34241 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34241 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34241 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34241 exists.

Affected product: Ctrlpanel-gg panel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-34241/ (Markdown: https://insights.sbomify.com/CVE-2026-34241/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34241
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34241
- OSV: https://osv.dev/vulnerability/CVE-2026-34241

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-34241/
Summaries are generated and may contain mistakes; the official description above is the record.