CVE-2020-36139Network attack vector

Reflected XSS via unsanitized fileurl parameter

Published Jun 4, 2021 · Updated Aug 4, 2024

BloofoxCMS 0.5.2.1 contains reflected cross-site scripting that allows remote authenticated users to execute script in a victim browser via a crafted fileurl parameter. The affected request reflects fileurl content into the generated page without output encoding, allowing attacker-controlled JavaScript to run in the browser context. Exploitation requires a victim to follow the crafted URL while authenticated to the CMS; the demonstrated impact is browser-side confidentiality and integrity loss without server availability impact.

CVSS severity5.4
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

BloofoxCMS 0.5.2.1 contains reflected cross-site scripting that allows remote authenticated users to execute script in a victim browser via a crafted fileurl parameter. The affected request reflects fileurl content into the generated page without output encoding, allowing attacker-controlled JavaScript to run in the browser context. Exploitation requires a victim to follow the crafted URL while authenticated to the CMS; the demonstrated impact is browser-side confidentiality and integrity loss without server availability impact.

The record

CVE
CVE-2020-36139
Published
Jun 4, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 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

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

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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