CVE-2026-54347 Froxlor: Stored XSS in DNS TXT Record Content Allows Customer-to-Admin Account Takeover
An authenticated customer can inject JavaScript into DNS TXT records, leading to admin account takeover when the admin views the configuration.
- 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
What is CVE-2026-54347?
CVE-2026-54347 is a high-severity cross-site scripting vulnerability in froxlor, published on 18 Aug 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
Froxlor is open source server administration software. Prior to 2.3.8, DNS TXT record content accepted by lib/Froxlor/Api/Commands/DomainZones.php can contain HTML special characters, lib/Froxlor/UI/Callbacks/Text.php returns the content from Text::wordwrap without HTML escaping, and templates/Froxlor/table/table.html.twig renders the callback result with the raw filter. An authenticated customer with DNS editor access can store JavaScript-bearing content in a TXT record. When an administrator views the affected domain's DNS configuration, the payload executes automatically in the administrator's browser session, which can expose session data or perform privileged panel actions. This issue is fixed in version 2.3.8.
Weakness: CWE-79
Which versions are affected by CVE-2026-54347?
2 open source packages ship an affected version, including froxlor/froxlor.
| Package | Affected | Fixed in |
|---|---|---|
froxlor/froxlor Packagist | All versions | 2.3.8 |
froxlor/froxlor Packagist | All versions | 2.3.8 |
How do I fix CVE-2026-54347?
Upgrade froxlor/froxlor to 2.3.8 or later.
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-2026-54347 being exploited?
There is no known exploitation of CVE-2026-54347 in the wild and no public exploit code.
Sources
Also known as GHSA-43gm-9rr3-cx7g.