CVE-2023-36483Network attack vector

Sensitive-data disclosure via predictable session identifiers

Published Mar 16, 2024 · Updated Aug 28, 2024

Authorization bypass in MASmobile Classic and ASP.NET Services allows remote authenticated users to read monitored-system data. The service identifies each login session with a numeric ID and accepts incremented or decremented IDs to return records belonging to other sessions. A valid low-privilege session is required; exposure is limited to customer data, security-system status, and event history, with no reported modification.

CVSS severity6.5
Medium
EPSS probability0.49%
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 MASmobile Classic and ASP.NET Services allows remote authenticated users to read monitored-system data. The service identifies each login session with a numeric ID and accepts incremented or decremented IDs to return records belonging to other sessions. A valid low-privilege session is required; exposure is limited to customer data, security-system status, and event history, with no reported modification.

The record

CVE
CVE-2023-36483
Published
Mar 16, 2024
Updated
Aug 28, 2024
Vendor
MAS
Product
MASmobile ASP.NET Services
Classifications
CWE-639, CAPEC-59, T1550.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=1 <=1.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MAS · MASmobile ASP.NET Servicesversion=1 <=1.9
MAS · MASmobile Classicversion=1 <=1.16.18; version=1 <=1.7.24
Carrier · MAS ASP.NET Servicesversion=1 <=1.9
Carrier · MASmobile Classicversion=1 <=1.16.18; version=1 <=1.7.24

Published CVSS scores

6.5Carrier Global CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CAPEC-59Session Credential Falsification through Prediction
T1550.004Use Alternate Authentication Material: Web Session Cookie

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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