CVE-2020-11712Public exploitNetwork attack vector

Stored script execution via uploaded filename

Published Apr 12, 2020 · Updated Aug 4, 2024

Stored XSS in Open Upload 0.4.3 and earlier allows remote attackers to execute script in a user's browser through an uploaded filename. The upload path accepts a filename containing HTML or JavaScript and later renders that stored value on file-link and administrative listings without neutralization. Exploitation requires a user to open the attacker-uploaded file link or an administrator to browse the file listing; the script then runs in that viewer's Open Upload origin.

CVSS severity6.1
Medium
EPSS probability1.06%
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 Open Upload 0.4.3 and earlier allows remote attackers to execute script in a user's browser through an uploaded filename. The upload path accepts a filename containing HTML or JavaScript and later renders that stored value on file-link and administrative listings without neutralization. Exploitation requires a user to open the attacker-uploaded file link or an administrator to browse the file listing; the script then runs in that viewer's Open Upload origin.

The record

CVE
CVE-2020-11712
Published
Apr 12, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 12, 2020CVE 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

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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