CVE-2026-32278Network attack vector

Administrator-browser script execution via unrestricted file upload

Published Mar 23, 2026 · Updated Mar 23, 2026

Stored XSS in the Connect-CMS Form Plugin before 1.41.1 and 2.0.0 through 2.41.0 allows remote attackers to run script in an administrator's browser. The file-upload path stored files without enforcing extension and MIME allowlists, and HTML was treated as viewable content. An administrator must view the stored content; execution can cause unauthorized actions or information theft in that browser context.

CVSS severity8.2
High
EPSS probability0.20%
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 the Connect-CMS Form Plugin before 1.41.1 and 2.0.0 through 2.41.0 allows remote attackers to run script in an administrator's browser. The file-upload path stored files without enforcing extension and MIME allowlists, and HTML was treated as viewable content. An administrator must view the stored content; execution can cause unauthorized actions or information theft in that browser context.

The record

CVE
CVE-2026-32278
Published
Mar 23, 2026
Updated
Mar 23, 2026
Vendor
OpenSource-WorkShop Co., Ltd.
Product
Connect-CMS
Classifications
CWE-79, CWE-434, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 23, 2026Record 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=< 1.41.1
  2. Affected versionversion=>= 2.0.0, < 2.41.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenSource-WorkShop Co., Ltd. · Connect-CMSversion=< 1.41.1; version=>= 2.0.0, < 2.41.1

Published CVSS scores

8.2GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L
4.8NIST National Vulnerability DatabaseCVSS: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-434Unrestricted Upload of File with Dangerous Type
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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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