CVE-2020-24903Public exploitNetwork attack vector

Reflected XSS via unvalidated Template.aspx Referrer parameter

Published Jan 7, 2021 · Updated Aug 4, 2024

Reflected XSS in Cute Editor for ASP.NET 6.4 allows remote attackers to execute script in a victim's browser through a crafted URL. Template.aspx reflects the Referrer parameter into its HTML response without properly validating or neutralizing attacker-controlled markup. A victim must click the URL; execution occurs in the hosting site's security context and can expose cookie-based authentication credentials.

CVSS severity6.1
Medium
EPSS probability2.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Cute Editor for ASP.NET 6.4 allows remote attackers to execute script in a victim's browser through a crafted URL. Template.aspx reflects the Referrer parameter into its HTML response without properly validating or neutralizing attacker-controlled markup. A victim must click the URL; execution occurs in the hosting site's security context and can expose cookie-based authentication credentials.

The record

CVE
CVE-2020-24903
Published
Jan 7, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
5.8Bugtraq disclosureAV:N/AC:M/Au:N/C:P/I:P/A:N
6.1NIST NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
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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