CVE-2025-66956
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 · uneditedInsecure Access Control in Contact Plan, E-Mail, SMS and Fax components in Asseco SEE Live 2.0 allows remote attackers to access and execute attachments via a computable URL.
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 confidenceInsecure access control in Contact Plan, E-Mail, SMS and Fax components of Asseco SEE Live 2.0 allows unauthenticated remote attackers to access and execute file attachments through predictable/computable URLs, enabling potential remote code execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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 if Asseco SEE Live 2.0 is installedCheck for the application in the system registry (Windows) or application directory (Linux). Look for installed packages named 'Live' or 'asseco' or check the web server document root for the application.Affected if Asseco SEE Live 2.0 is found installed on the system
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Determine the installed versionCheck the application version via its about page, configuration files, or installed packages. Common locations: /opt/live/version, %PROGRAMFILES%/AssecoSEE/Live/version.info, or the application's main DLL/config file.Affected if The installed version is 2.0 or matches the 2.0 release line
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Verify if affected components are enabledCheck the application configuration for Contact Plan, E-Mail, SMS, and Fax modules. Look in the main config.xml, web.xml, or admin console for enabled features.Affected if Any of Contact Plan, E-Mail, SMS, or Fax components are enabled or active
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Inspect attachment access URL patternsReview the web application's URL routing for attachment/file download endpoints. Common patterns include /attachments/, /download/, /files/, /upload/. Check if these endpoints accept predictable parameters like IDs, timestamps, or sequential numbers without requiring authentication.Affected if Attachment endpoints use predictable/computable URL parameters and allow unauthenticated access
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Test attachment download without authenticationAttempt to access attachment URLs directly using a browser or curl without providing session credentials. Try common patterns like /ContactPlan/attachments/{id}, /Email/attachments/{id}, /SMS/attachments/{id}, /Fax/attachments/{id}.Affected if Files can be downloaded or executed without authentication
A user is affected if Asseco SEE Live 2.0 is installed with any of the Contact Plan, E-Mail, SMS, or Fax components enabled, and attachment URLs are accessible without authentication.
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 proper authentication and authorization checks on all attachment access paths across affected components, ensuring URLs are not directly enumerable or predictable without proper session validation.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-66956 — 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-2025-66956 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
- No spam, self-promotion, credentials, or personal data