CVE-2020-28390
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 · uneditedA vulnerability has been identified in Opcenter Execution Core (V8.2), Opcenter Execution Core (V8.3). The application contains an information leakage vulnerability in the handling of web client sessions. A local attacker who has access to the Web Client Session Storage could disclose the passwords of currently logged-in users.
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 confidenceThe application stores user passwords in plaintext within the web client session storage. A local attacker with access to this storage can read session data and extract credentials of currently logged-in users, enabling account takeover.
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= 8.2= 8.3CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/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 Siemens Opcenter Execution Core versionLocate and inspect the application version through the product's about dialog, installation directory metadata, or version query command provided by SiemensAffected if The installed version is 8.2 or 8.3 specifically
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Locate web client session storageIdentify where the application stores web client session data; this is typically found in application data directories, temp folders, or session file storage locations configured for the web clientAffected if Session storage exists and is accessible on the system
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Inspect session data for plaintext passwordsExamine session files or storage entries for any field that contains plaintext password data; search session content for password-related keys or credential stringsAffected if Session data contains plaintext password values for authenticated users
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Verify local access to session storageCheck file system permissions on the session storage location to determine if local unprivileged users can read session filesAffected if Session storage is readable by users other than the application service account
You are affected if running version 8.2 or 8.3 AND your web client session storage contains plaintext passwords that are accessible to local users.
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 secure session management by removing password storage from sessions entirely and using token-based authentication; encrypt session data at rest if retention is absolutely necessary.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2020-28390 — 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-2020-28390 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
- No spam, self-promotion, credentials, or personal data