CVE-2021-24323Public exploitNetwork attack vector

Browser script execution via unescaped tax class labels

Published May 17, 2021 · Updated Aug 3, 2024

Stored cross-site scripting in WooCommerce before 5.2.0 allows remote authenticated users to run script through a crafted tax class name. WC_Settings_Page::output_sections renders tax-setting labels without HTML escaping, so a saved Additional tax classes value becomes active markup. Administrative access and enabled taxes are required to store the payload; it executes when a user loads the affected dashboard section, even with unfiltered_html disabled.

CVSS severity4.8
Medium
EPSS probability0.74%
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 WooCommerce before 5.2.0 allows remote authenticated users to run script through a crafted tax class name. WC_Settings_Page::output_sections renders tax-setting labels without HTML escaping, so a saved Additional tax classes value becomes active markup. Administrative access and enabled taxes are required to store the payload; it executes when a user loads the affected dashboard section, even with unfiltered_html disabled.

The record

CVE
CVE-2021-24323
Published
May 17, 2021
Updated
Aug 3, 2024
Vendor
Automattic
Product
WooCommerce
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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

  1. Affected versionversion=5.2.0 <5.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Automattic · WooCommerceversion=5.2.0 <5.2.0

Published CVSS scores

4.8GitHub Advisory DatabaseCVSS: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')
T1059.007JavaScript/JScript

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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