Medium severity · published Feb 11, 2026
CVE-2019-25311
thesystem Persistent XSS
5.4
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TH
thesystem · kostasmitroglou
1.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-25311
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-25311
Product
https://github.com/kostasmitroglou/thesystem
Exploit
https://www.exploit-db.com/exploits/47440
Third Party Advisory
https://www.vulncheck.com/advisories/thesystem-persistent-xss
More from thesystem
9.8
CVE-2019-25441
thesystem 1.0 Command Injection via run_command endpoint
7.5
CVE-2019-25347
thesystem App 1.0 - 'username' SQL Injection
7.5
CVE-2019-25346
thesystem 1.0 - 'server_name' SQL Injection