CVE-2023-33282Network attack vector

Unauthenticated backend access via default account credentials

Published Jun 7, 2023 · Updated Jan 7, 2025

Authentication bypass in Marval MSM through 14.19.0.12476 and 15.0 allows remote attackers to create authenticated sessions. The installer assigns a default database password to the internal System account, and the login flow accepts those credentials for session creation. No prior account is required; the resulting session exposes certain API and backend functions without providing a working graphical interface.

CVSS severity9.8
Critical
EPSS probability0.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Marval MSM through 14.19.0.12476 and 15.0 allows remote attackers to create authenticated sessions. The installer assigns a default database password to the internal System account, and the login flow accepts those credentials for session creation. No prior account is required; the resulting session exposes certain API and backend functions without providing a working graphical interface.

The record

CVE
CVE-2023-33282
Published
Jun 7, 2023
Updated
Jan 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-276, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 7, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1078.001Valid Accounts: Default Accounts

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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