CVE-2023-6591Public exploitNetwork attack vector

Stored XSS via unescaped Custom Content

Published Feb 12, 2024 · Updated Oct 28, 2024

Stored XSS in AYS Pro Plugins Popup Box Pro before 20.9.0 allows remote authenticated users to execute JavaScript in visitors' browsers. The Custom Content setting stores administrator-supplied markup without sanitization or output escaping and renders it when the blog page is visited. Administrator access is required to save the payload, and execution requires a visitor to load the affected page.

CVSS severity4.8
Medium
EPSS probability0.48%
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 Pro before 20.9.0 allows remote authenticated users to execute JavaScript in visitors' browsers. The Custom Content setting stores administrator-supplied markup without sanitization or output escaping and renders it when the blog page is visited. Administrator access is required to save the payload, and execution requires a visitor to load the affected page.

The record

CVE
CVE-2023-6591
Published
Feb 12, 2024
Updated
Oct 28, 2024
Vendor
AYS Pro Plugins
Product
Popup Box Pro
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 2024Record 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=20.8.7 <20.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

AYS Pro Plugins · Popup Box Proversion=20.8.7 <20.9.0

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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