CVE-2021-24681Public exploitNetwork attack vector

Stored XSS via unescaped post suffix setting

Published Oct 11, 2021 · Updated Aug 3, 2024

Stored cross-site scripting in Webdesi9 Inc. Duplicate Page 4.4.2 and earlier allows remote authenticated users to inject scripts via suffix settings. The Duplicate Post Suffix setting stores attacker-supplied markup and later inserts it into plugin output without adequate sanitization or escaping. Administrative privileges and a viewer loading the affected output are required; injected JavaScript executes in that viewer's browser even when unfiltered_html is disabled.

CVSS severity4.8
Medium
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Webdesi9 Inc. Duplicate Page 4.4.2 and earlier allows remote authenticated users to inject scripts via suffix settings. The Duplicate Post Suffix setting stores attacker-supplied markup and later inserts it into plugin output without adequate sanitization or escaping. Administrative privileges and a viewer loading the affected output are required; injected JavaScript executes in that viewer's browser even when unfiltered_html is disabled.

The record

CVE
CVE-2021-24681
Published
Oct 11, 2021
Updated
Aug 3, 2024
Vendor
Webdesi9 Inc.
Product
Duplicate Page
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 11, 2021CVE 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=4.4.2 <=4.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Webdesi9 Inc. · Duplicate Pageversion=4.4.2 <=4.4.2

Published CVSS scores

3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
4.8NVDCVSS: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')
T1059.007Command and Scripting Interpreter: JavaScript/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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