CVE-2023-4376Public exploitNetwork attack vector

Stored XSS via unescaped code and list names

Published Sep 19, 2023 · Updated Apr 23, 2025

Stored XSS in the Serial Codes Generator plugin before 2.4.15 allows remote authenticated users to execute scripts in an administrator's browser. The code-storage and code-list-name fields persist HTML without sanitization or output escaping, so reopening the plugin settings renders attacker-supplied script. Administrator-level access is required under the CNA record, and exploitation remains possible when unfiltered_html is disabled, including WordPress multisite configurations.

CVSS severity5.9
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in the Serial Codes Generator plugin before 2.4.15 allows remote authenticated users to execute scripts in an administrator's browser. The code-storage and code-list-name fields persist HTML without sanitization or output escaping, so reopening the plugin settings renders attacker-supplied script. Administrator-level access is required under the CNA record, and exploitation remains possible when unfiltered_html is disabled, including WordPress multisite configurations.

The record

CVE
CVE-2023-4376
Published
Sep 19, 2023
Updated
Apr 23, 2025
Vendor
Vollstart
Product
Serial Codes Generator and Validator with WooCommerce Support
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <2.4.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Vollstart · Serial Codes Generator and Validator with WooCommerce Supportversion=0 <2.4.15

Published CVSS scores

5.9NISTCVSS: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')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo