CVE-2019-20524Network attack vector

Cross-site scripting via unescaped Banner parameter

Published Mar 19, 2020 · Updated Aug 5, 2024

Cross-site scripting in the partner index of ilchCMS 2.1.23 allows remote attackers to execute scripts in a victim browser via a crafted Banner POST. A crafted POST Banner value containing script markup is accepted by the index.php/partner/index endpoint and rendered as executable HTML because output encoding is inadequate. Exploitation requires no authentication but does require a victim to submit or view the affected page; impact is script execution in that victim's browser.

CVSS severity6.1
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in the partner index of ilchCMS 2.1.23 allows remote attackers to execute scripts in a victim browser via a crafted Banner POST. A crafted POST Banner value containing script markup is accepted by the index.php/partner/index endpoint and rendered as executable HTML because output encoding is inadequate. Exploitation requires no authentication but does require a victim to submit or view the affected page; impact is script execution in that victim's browser.

The record

CVE
CVE-2019-20524
Published
Mar 19, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 19, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Stored XSS

Public exploit references

No public exploit references are available in this record.

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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