CVE-2023-1554Public exploitNetwork attack vector

Stored XSS via unescaped sandbox setting

Published May 2, 2023 · Updated Jan 30, 2025

Stored XSS in Fullworks Digital Quick PayPal Payments before 5.7.26.4 allows remote authenticated users to inject scripts via settings. The settings handler stores the sandbox field without sufficient sanitization and renders it without context-appropriate escaping. Administrator privileges are required, and exploitation is limited to multisite or other installations where unfiltered_html is disabled; injected scripts execute when a user opens the affected page.

CVSS severity4.4
Medium
EPSS probability0.47%
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 Fullworks Digital Quick PayPal Payments before 5.7.26.4 allows remote authenticated users to inject scripts via settings. The settings handler stores the sandbox field without sufficient sanitization and renders it without context-appropriate escaping. Administrator privileges are required, and exploitation is limited to multisite or other installations where unfiltered_html is disabled; injected scripts execute when a user opens the affected page.

The record

CVE
CVE-2023-1554
Published
May 2, 2023
Updated
Jan 30, 2025
Vendor
Fullworks Digital Ltd.
Product
Quick PayPal Payments
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 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=0 <5.7.26.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Fullworks Digital Ltd. · Quick PayPal Paymentsversion=0 <5.7.26.4

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/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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