CVE-2024-21627Network attack vector

Cross-site scripting via incomplete event-attribute validation

Published Jan 2, 2024 · Updated Jun 3, 2025

Cross-site scripting in PrestaShop before 1.7.8.11 and 8.0.0 through 8.1.2 allows remote authenticated users to execute browser script. Validate::isCleanHTML relies on incomplete event-attribute patterns, allowing unlisted on-prefixed handlers in user-supplied HTML to pass validation. Exploitation requires high privileges, a module that validates attacker-controlled HTML with this method, and a user who renders the content; the script can read or alter data available to that user's browser.

CVSS severity8.1
High
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

Cross-site scripting in PrestaShop before 1.7.8.11 and 8.0.0 through 8.1.2 allows remote authenticated users to execute browser script. Validate::isCleanHTML relies on incomplete event-attribute patterns, allowing unlisted on-prefixed handlers in user-supplied HTML to pass validation. Exploitation requires high privileges, a module that validates attacker-controlled HTML with this method, and a user who renders the content; the script can read or alter data available to that user's browser.

The record

CVE
CVE-2024-21627
Published
Jan 2, 2024
Updated
Jun 3, 2025
Vendor
PrestaShop
Product
PrestaShop
Classifications
CWE-20, CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.7.8.11
  2. Affected versionversion=>= 8.0.0, < 8.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

PrestaShop · PrestaShopversion=< 1.7.8.11; version=>= 8.0.0, < 8.1.3

Published CVSS scores

6.1National Institute of Standards and TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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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