CVE-2023-28666Public exploitNetwork attack vector

Authenticated script execution via unfiltered imgurl reflection

Published Mar 22, 2023 · Updated Feb 25, 2025

Reflected XSS in PluginUs.Net InPost Gallery 2.1.4.1 and earlier allows remote authenticated users to execute script in a victim's browser. The add_inpost_gallery_slide_item action returns the imgurl parameter in its HTTP response without filtering or output encoding. Exploitation requires an authenticated user to open a crafted admin-ajax URL; the injected script runs in that user's browser context.

CVSS severity5.4
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in PluginUs.Net InPost Gallery 2.1.4.1 and earlier allows remote authenticated users to execute script in a victim's browser. The add_inpost_gallery_slide_item action returns the imgurl parameter in its HTTP response without filtering or output encoding. Exploitation requires an authenticated user to open a crafted admin-ajax URL; the injected script runs in that user's browser context.

The record

CVE
CVE-2023-28666
Published
Mar 22, 2023
Updated
Feb 25, 2025
Vendor
PluginUs.Net
Product
InPost Gallery
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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=<= 2.1.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PluginUs.Net · InPost Galleryversion=<= 2.1.4.1

Published CVSS scores

5.4Tenable ResearchCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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')
T1189Drive-by Compromise

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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