CVE-2026-32104Public exploitNetwork attack vector

Authenticated notification tampering via user-controlled account ID

Published Mar 11, 2026 · Updated Mar 11, 2026

Authorization bypass in StudioCMS before 0.4.3 allows remote authenticated users to alter any user's notification preferences. The updateUserNotifications handler passes the payload's user ID to the account update operation without verifying ownership of the target account. Visitor-level access is sufficient to disable administrator alerts, suppressing notifications about later account activity.

CVSS severity5.4
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in StudioCMS before 0.4.3 allows remote authenticated users to alter any user's notification preferences. The updateUserNotifications handler passes the payload's user ID to the account update operation without verifying ownership of the target account. Visitor-level access is sufficient to disable administrator alerts, suppressing notifications about later account activity.

The record

CVE
CVE-2026-32104
Published
Mar 11, 2026
Updated
Mar 11, 2026
Vendor
withStudioCMS
Product
StudioCMS
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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=< 0.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

withStudioCMS · StudioCMSversion=< 0.4.3

Published CVSS scores

5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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.

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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-639Authorization Bypass Through User-Controlled Key
T1565.001Stored Data Manipulation

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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