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Authorization Bypass (IDOR)Weakness · CWE-639

CVE-2025-5261

HIGH · 7.5 CVSS v3.1 Published 2025-08-20
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 · unedited
Authorization Bypass Through User-Controlled Key vulnerability in Pik Online Yazılım Çözümleri A.Ş. Pik Online allows Exploitation of Trusted Identifiers. This issue affects Pik Online: before 3.1.5.

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 · moderate confidence

This is a broken access control vulnerability where the application uses user-controllable input (such as a parameter in a request) as a trusted identifier for authorization decisions. An attacker can manipulate this identifier to bypass authentication and access unauthorized resources or functionality that should be restricted.

MitigationUpgrade to Pik Online version 3.1.5 or later. Additionally, implement proper server-side authorization checks that validate user permissions against resources, rather than trusting client-supplied identifiers.

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
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify Pik Online version
    Check the application's version number in the UI, about page, or API endpoint (common paths: /version, /api/info, or check headers/footer). Compare it to the affected range (versions before 3.1.5).
    Affected if Installed version is earlier than 3.1.5
  2. Audit API endpoints for user-supplied identifiers
    Review all API endpoints and URL parameters that accept user input (such as ?id=, ?userId=, ?resourceId=, ?accountId=). These are potential vectors where user-controllable identifiers could be abused.
    Affected if Endpoints accept object identifiers directly from the request without server-side validation
  3. Inspect authorization logic
    Examine server-side code or configuration files that handle access control. Look for logic that uses request parameters (GET/POST body, headers) as trusted identifiers for permission checks rather than server-resolved session or user context.
    Affected if Authorization decisions rely on client-supplied identifiers instead of server-validated session data
  4. Test for IDOR vulnerabilities
    Attempt to access resources belonging to other users by manipulating identifier parameters in requests (such as changing an ID in the URL or body to another user's ID). Observe whether the application rejects unauthorized access.
    Affected if Requests with modified identifiers succeed when they should be denied
  5. Verify server-side permission checks exist
    For each protected endpoint, confirm that server-side code validates that the authenticated user has permission to access the specific resource identified in the request, not just that they are logged in.
    Affected if Protected endpoints lack proper server-side permission validation for resource-level access

A user is affected if Pik Online version is below 3.1.5 AND the application uses client-supplied identifiers (from request parameters or body) to make authorization decisions without server-side validation.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade to Pik Online version 3.1.5 or later. Additionally, implement proper server-side authorization checks that validate user permissions against resources, rather than trusting client-supplied identifiers.

Recommended fix Moderate confidence

3.1.5

  1. 1. Backup your current Pik Online installation and database before making any changes.
  2. 2. Obtain the updated Pik Online version 3.1.5 or later from the vendor (Pik Online Yazılım Çözümleri A.Ş.).
  3. 3. Review the vendor's upgrade documentation for version 3.1.5.
  4. 4. Apply the upgrade following the vendor's recommended migration procedure.
  5. 5. Verify that the IDOR vulnerability is resolved by testing that unauthorized access to other users' resources is prevented.
  6. 6. Confirm normal application functionality after the upgrade.

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-5261 in production — separate from our analysis above.

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What this is

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.

What belongs here
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  • Version or environment caveats, and links to real fixes
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