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Connect-CMS has Arbitrary Code Execution by an Authenticated User in its Code Study Plugin

High severity GitHub Reviewed Published Mar 23, 2026 in opensource-workshop/connect-cms • Updated Mar 23, 2026

Package

composer opensource-workshop/connect-cms (Composer)

Affected versions

< 1.41.1
>= 2.0.0, < 2.41.1

Patched versions

1.41.1
2.41.1

Description

Security Advisory — Code Study Plugin

Summary

An authenticated user may be able to execute arbitrary code in the Code Study Plugin.

Affected Versions

  • 1.x series: <= 1.41.0
  • 2.x series: <= 2.41.0

Patched Versions

  • 1.41.1
  • 2.41.1

Description

In the Code Study Plugin, an authenticated user could trigger unintended code execution. If exploited, it may lead to code execution on the server or information disclosure. Users affected by this vulnerability should update to a fixed version.

Solution

Update to the fixed version.
For the 1.x series, update to 1.41.1 or later.
For the 2.x series, update to 2.41.1 or later.

Credits

OpenSource WorkShop thanks Sho Odagiri (小田切 祥) of GMO Cybersecurity by Ierae, Inc. for reporting this vulnerability.

References

@gakigaki gakigaki published to opensource-workshop/connect-cms Mar 23, 2026
Published to the GitHub Advisory Database Mar 23, 2026
Reviewed Mar 23, 2026
Last updated Mar 23, 2026

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(20th percentile)

Weaknesses

Improper Control of Generation of Code ('Code Injection')

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Learn more on MITRE.

CVE ID

CVE-2026-32276

GHSA ID

GHSA-hxqw-6qv7-cqfv

Source code

Credits

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