CVE-2023-4811Public exploitNetwork attack vector

Stored XSS via unsanitized redirectlink shortcode attribute

Published Oct 16, 2023 · Updated Apr 23, 2025

Stored XSS in Iptanus File Upload before 4.23.3 allows remote authenticated users to execute JavaScript through a crafted shortcode. The redirectlink attribute accepts a javascript: URL and supplies it to the post-upload browser redirect without sanitizing or escaping it. Contributor-level access to add crafted shortcode content and a visitor who completes an upload are required, exposing that visitor's browser session to script execution.

CVSS severity5.4
Medium
EPSS probability0.39%
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 Iptanus File Upload before 4.23.3 allows remote authenticated users to execute JavaScript through a crafted shortcode. The redirectlink attribute accepts a javascript: URL and supplies it to the post-upload browser redirect without sanitizing or escaping it. Contributor-level access to add crafted shortcode content and a visitor who completes an upload are required, exposing that visitor's browser session to script execution.

The record

CVE
CVE-2023-4811
Published
Oct 16, 2023
Updated
Apr 23, 2025
Vendor
Iptanus
Product
Iptanus File Upload
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 16, 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 <4.23.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Iptanus · Iptanus File Uploadversion=0 <4.23.3

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
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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