CVE-2023-4390Public exploitNetwork attack vector

Administrator-level stored XSS via unsanitized popup fields

Published Oct 31, 2023 · Updated Apr 23, 2025

Stored XSS in AYS Pro Plugins Popup Box before 3.7.2 allows remote authenticated users to inject scripts through popup fields. The plugin stores Custom Content and Popup Description input without adequate sanitization or output escaping, then executes injected script when the popup is edited or displayed on the frontend. Administrator-level access is required, but exploitation remains possible when unfiltered_html is disabled and can affect editors or visitors who view the stored content.

CVSS severity4.8
Medium
EPSS probability0.40%
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 AYS Pro Plugins Popup Box before 3.7.2 allows remote authenticated users to inject scripts through popup fields. The plugin stores Custom Content and Popup Description input without adequate sanitization or output escaping, then executes injected script when the popup is edited or displayed on the frontend. Administrator-level access is required, but exploitation remains possible when unfiltered_html is disabled and can affect editors or visitors who view the stored content.

The record

CVE
CVE-2023-4390
Published
Oct 31, 2023
Updated
Apr 23, 2025
Vendor
AYS Pro Plugins
Product
Popup Box
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 31, 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

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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 <3.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

AYS Pro Plugins · Popup Boxversion=0 <3.7.2

Published CVSS scores

4.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8NIST NVDCVSS: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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