CVE-2019-25399Public exploitNetwork attack vector

Stored XSS via unencoded extrahd parameters

Published Feb 18, 2026 · Updated Feb 18, 2026

Stored XSS in IPFire 2.21 Core Update 127 allows remote authenticated users to execute JavaScript through extrahd.cgi POST parameters. The script stores FS, PATH, and UUID values and later renders injected script markup without effective output encoding. Submitting a payload requires authenticated WebGUI access, and execution occurs in the context of an authenticated administrator session.

CVSS severity5.1
Medium
EPSS probability0.23%
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 IPFire 2.21 Core Update 127 allows remote authenticated users to execute JavaScript through extrahd.cgi POST parameters. The script stores FS, PATH, and UUID values and later renders injected script markup without effective output encoding. Submitting a payload requires authenticated WebGUI access, and execution occurs in the context of an authenticated administrator session.

The record

CVE
CVE-2019-25399
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
IPFire Project
Product
IPFire
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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=IPFire 2.21 - Core Update 127

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IPFire Project · IPFireversion=IPFire 2.21 - Core Update 127

Published CVSS scores

5.1VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.4VulnCheck CNACVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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