CVE-2023-28395
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 · uneditedOsprey Pump Controller version 1.01 is vulnerable to a weak session token generation algorithm that can be predicted and can aid in authentication and authorization bypass. This may allow an attacker to hijack a session by predicting the session id and gain unauthorized access to the product.
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 confidenceOsprey Pump Controller version 1.01 uses a weak, predictable algorithm to generate session tokens. An attacker can analyze the session ID pattern and predict valid session tokens, enabling session hijacking and unauthorized access to the application.
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= 1.01CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 the firmware versionAccess the device administration interface or check the firmware file/header. Look for version information in the system settings, about page, or by querying the device's system info endpoint (e.g., /api/system/info or similar). Compare against version 1.01.Affected if The firmware version is exactly 1.01.
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Verify session management is enabledCheck if the web interface or API allows authenticated sessions. Attempt to log in and capture a session token (cookie or header). If the application creates session identifiers upon authentication, session management is active.Affected if The application uses session-based authentication and creates session tokens.
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Analyze session token patternsGenerate multiple session tokens by logging in repeatedly or triggering new sessions. Capture at least 5-10 session IDs and examine them for patterns such as sequential numbers, timestamps, or predictable encoding. Use tools like Burp Suite or simple string analysis to compare token structures.Affected if Session tokens exhibit predictable patterns (e.g., incrementing values, timestamps embedded, low entropy, or base64-encoded sequential data).
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Inspect session token generation configurationIf firmware extraction or debug access is available, examine configuration files or session management code for the token generation algorithm. Look for uses of weak random functions, predictable seeds, or hardcoded patterns.Affected if The configuration or code shows use of weak/random functions without cryptographic randomness or uses predictable values as session seeds.
You are affected if the Osprey Pump Controller firmware is version 1.01 and the application uses session-based authentication with predictable session tokens.
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 dataReplace the weak session token generation with a cryptographically secure random number generator (CSPRNG) and implement proper session validation mechanisms.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-28395 — 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-2023-28395 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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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