CVE-2020-21967Public exploitNetwork attack vector

Stored cross-site scripting via uploaded HTML files

Published Jul 13, 2022 · Updated Aug 4, 2024

Stored cross-site scripting in PrestaShop 1.7.6.7 allows remote authenticated users to execute script in a customer's browser via an HTML upload. The Catalog file-upload path accepts an HTML file containing script without content checks and serves it as product content, causing the script to run when opened. Back-office privileges are required to upload the file, and a customer must click it; the demonstrated impact is cookie theft or browser-side actions.

CVSS severity4.8
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in PrestaShop 1.7.6.7 allows remote authenticated users to execute script in a customer's browser via an HTML upload. The Catalog file-upload path accepts an HTML file containing script without content checks and serves it as product content, causing the script to run when opened. Back-office privileges are required to upload the file, and a customer must click it; the demonstrated impact is cookie theft or browser-side actions.

The record

CVE
CVE-2020-21967
Published
Jul 13, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1539
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 13, 2022CVE 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1539Steal Web Session Cookie

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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