CVE-2019-25311Public exploitNetwork attack vector

Unauthenticated browser script execution via raw server records

Published Feb 11, 2026 · Updated Feb 11, 2026

Stored XSS in thesystem 1.0 allows remote attackers to execute JavaScript in victim browsers through crafted server records. The add_server view stores six POST fields without sanitization, and show_server_data places the resulting database rows in an HTML response without output encoding. Neither view enforces authentication; a visitor can persist a payload that runs when another user opens the server-data endpoint, exposing that user's browser session to script-controlled actions.

CVSS severity5.1
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in thesystem 1.0 allows remote attackers to execute JavaScript in victim browsers through crafted server records. The add_server view stores six POST fields without sanitization, and show_server_data places the resulting database rows in an HTML response without output encoding. Neither view enforces authentication; a visitor can persist a payload that runs when another user opens the server-data endpoint, exposing that user's browser session to script-controlled actions.

The record

CVE
CVE-2019-25311
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
Kostas Mitroglou
Product
thesystem
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kostas Mitroglou · thesystemversion=1.0

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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