CVE-2019-25311 thesystem Persistent XSS
Attackers can inject malicious scripts via multiple input fields in thesystem, leading to arbitrary JavaScript execution in victim browsers.
- 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-2019-25311?
CVE-2019-25311 is a medium-severity cross-site scripting vulnerability in kostasmitroglou thesystem, published on 11 Feb 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
thesystem version 1.0 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts through multiple server data input fields. Attackers can submit crafted script payloads in operating_system, system_owner, system_username, system_password, system_description, and server_name parameters to execute arbitrary JavaScript in victim browsers.
Weakness: CWE-79
Which versions are affected by CVE-2019-25311?
It affects 1 product.
Products include Kostasmitroglou Thesystem.
How do I fix CVE-2019-25311?
No fix has been published for CVE-2019-25311 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-2019-25311 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25311 exists.
Other vulnerabilities in kostasmitroglou thesystem
Sources
Also known as GHSA-9qqr-wpm4-gqc3.