CVE-2020-24901Known exploitationPublic exploitNetwork attack vector

Script execution via unconstrained remote JavaScript load

Published Jan 7, 2021 · Updated Apr 3, 2025

Reflected XSS in Krpano Panorama Viewer 1.20.8 and earlier allows remote attackers to execute script through a crafted viewer URL. The viewer/krpano.html page accepts plugin[test].url from the query string and loads remote JavaScript without constraining its source. A victim must open the crafted URL, after which the script runs in the hosting site's browser context and can read or alter data available to that context.

CVSS severity6.1
Medium
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Krpano Panorama Viewer 1.20.8 and earlier allows remote attackers to execute script through a crafted viewer URL. The viewer/krpano.html page accepts plugin[test].url from the query string and loads remote JavaScript without constraining its source. A victim must open the crafted URL, after which the script runs in the hosting site's browser context and can read or alter data available to that context.

The record

CVE
CVE-2020-24901
Published
Jan 7, 2021
Updated
Apr 3, 2025
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. Apr 3, 2025Record 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
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1CISA-ADPCVSS: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 exploitationReported
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.

Reported exploitation

Technologies

Your stack

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Your stack

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