CVE-2020-19202Public exploitNetwork attack vector

Stored script execution via unescaped portal title

Published Jun 17, 2021 · Updated Aug 4, 2024

Stored XSS in IPFire 2.21 Core Update 130 allows remote authenticated users to run script in a visitor's browser via a crafted portal title. The captive.cgi handler assigns the unescaped TITLE parameter to stored portal settings and later renders it in the Captive Portal page. Privileged WebGUI access is required to plant the title, and the script runs when a victim opens the portal, enabling cookie theft or unauthorized configuration changes.

CVSS severity5.4
Medium
EPSS probability0.57%
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 130 allows remote authenticated users to run script in a visitor's browser via a crafted portal title. The captive.cgi handler assigns the unescaped TITLE parameter to stored portal settings and later renders it in the Captive Portal page. Privileged WebGUI access is required to plant the title, and the script runs when a victim opens the portal, enabling cookie theft or unauthorized configuration changes.

The record

CVE
CVE-2020-19202
Published
Jun 17, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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.

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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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