CVE-2023-36483
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAuthorization bypass can be achieved by session ID prediction in MASmobile Classic Android version 1.16.18 and earlier and MASmobile Classic iOS version 1.7.24 and earlier which allows remote attackers to retrieve sensitive data including customer data, security system status, and event history.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceSession ID prediction vulnerability in MASmobile Classic allows attackers to bypass authorization by predicting session identifiers. The weak session ID generation enables unauthorized access to sensitive data including customer records, security system status, and event history without valid credentials.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 1.9<= 1.7.24<= 1.16.18CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed MASmobile versionLocate the MASmobile installation directory and check version information in the application metadata, About page, or version file (commonly found in assembly info, manifest, or product info files within the installation folder)Affected if The version is MASmobile Asp.net Services <= 1.9, or MASmobile Classic <= 1.7.24 or <= 1.16.18
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Confirm session management is activeVerify the MASmobile web application is configured to handle user sessions by checking the application configuration files (web.config, app.config) for sessionState settings or session management module declarationsAffected if Session state is enabled and the application uses its built-in session handling (not delegated to a secure external session manager)
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Examine session ID generation mechanismReview application code or configuration for session ID generation logic. Look for custom session handlers or references to SessionIDManager - check whether the application uses standard .NET session ID generation or implements custom predictable session ID creationAffected if The application implements custom session ID generation or uses the default .NET session ID manager without additional cryptographic hardening (the vulnerability exists in the built-in session ID generation)
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Check for weak session entropy indicatorsInspect configuration files or code for session-related settings such as regenerateExpiredSessionId, cookieless session configuration, or custom session key generation that may indicate predictable session identifiersAffected if Settings indicate non-cryptographically secure session ID generation (e.g., time-based, sequence-based, or insufficient random session IDs)
The environment is affected if MASmobile Asp.net Services version is 1.9 or lower, or MASmobile Classic is version 1.7.24/1.16.18 or lower, and the application relies on its built-in session management without cryptographic hardening.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement cryptographically secure session ID generation using a sufficient entropy source (e.g., secure random generator with minimum 128-bit entropy) and invalidate all existing predictable sessions. Consider adding secondary session validation controls.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-36483 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-36483 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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