CVE-2021-25043Public exploitNetwork attack vector

Reflected XSS via unescaped custom_prices output

Published Jan 10, 2022 · Updated Aug 3, 2024

Reflected XSS in PluginUs.Net FOX before 1.3.7.3 allows remote attackers to execute script in a victim's browser via custom_prices. The unauthenticated woocs_get_custom_price_html AJAX handler returns custom_prices values in its JSON response without sanitizing or escaping them. Exploitation requires a victim to follow a crafted request; injected script runs in the affected site's origin and can access or alter browser-visible data.

CVSS severity6.1
Medium
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in PluginUs.Net FOX before 1.3.7.3 allows remote attackers to execute script in a victim's browser via custom_prices. The unauthenticated woocs_get_custom_price_html AJAX handler returns custom_prices values in its JSON response without sanitizing or escaping them. Exploitation requires a victim to follow a crafted request; injected script runs in the affected site's origin and can access or alter browser-visible data.

The record

CVE
CVE-2021-25043
Published
Jan 10, 2022
Updated
Aug 3, 2024
Vendor
PluginUs.Net
Product
FOX – Currency Switcher Professional for WooCommerce
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 10, 2022CVE 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=1.3.7.3 <1.3.7.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PluginUs.Net · FOX – Currency Switcher Professional for WooCommerceversion=1.3.7.3 <1.3.7.3

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/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
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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