CVE-2020-12528Network attack vector

Cross-account session interruption via improper access validation

Published Mar 2, 2021 · Updated Sep 16, 2024

Improper access validation in MB connect line mbCONNECT24 and mymbCONNECT24 through 2.6.2 allows remote authenticated users to end web2go sessions. The vendor has not published the endpoint or parameter where validation fails; it states only that cross-account session termination is accepted. Any logged-in account can interrupt another account's remote browser-based session, with no reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access validation in MB connect line mbCONNECT24 and mymbCONNECT24 through 2.6.2 allows remote authenticated users to end web2go sessions. The vendor has not published the endpoint or parameter where validation fails; it states only that cross-account session termination is accepted. Any logged-in account can interrupt another account's remote browser-based session, with no reported data disclosure or modification.

The record

CVE
CVE-2020-12528
Published
Mar 2, 2021
Updated
Sep 16, 2024
Vendor
MB connect line
Product
mbCONNECT24
Classifications
CWE-269, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=2.6.2 <=2.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MB connect line · mbCONNECT24version=2.6.2 <=2.6.2
MB connect line · mymbCONNECT24version=2.6.2 <=2.6.2

Published CVSS scores

7.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
4.0NIST NVDAV:N/AC:L/Au:S/C:N/I:N/A:P
6.5CERT VDECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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