Deserialization of Untrusted DataWeakness · CWE-502

CVE-2025-69111

CRITICAL · 9.8 CVSS v3.1 Published 2026-06-17
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
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
Unauthenticated PHP Object Injection in Reisen <= 1.4.1 versions.

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 · low confidence

Unauthenticated PHP Object Injection vulnerability in Reisen CMS versions 1.4.1 and below allows remote attackers to inject malicious PHP objects into the application by leveraging unsafe deserialization of untrusted input, potentially leading to remote code execution.

MitigationUpgrade to a version newer than 1.4.1 if available, or implement input validation/sanitization to prevent unsafe deserialization of user-controlled data.

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
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 checks

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

  1. Identify Reisen CMS installation
    Locate Reisen CMS files in the web root directory (commonly in directories named 'reisen', 'cms', or at the root level). Check for files like index.php, admin/, or config files that contain 'Reisen' or 'reisen' in their content.
    Affected if Reisen CMS is found on the server
  2. Determine installed version
    Open the main index.php or a version/configuration file within the Reisen CMS directory. Look for a version string, version constant, or changelog file. Compare the found version to '1.4.1' - versions at or below 1.4.1 are affected.
    Affected if Installed version is 1.4.1 or lower
  3. Verify unauthenticated access to deserialization input
    Examine PHP files that handle request parameters (GET, POST, COOKIE). Look for usage of unserialize() function on untrusted input without prior authentication checks. Search for 'unserialize' in the source code and trace whether the input source is user-controlled.
    Affected if Code uses unserialize() on user-controlled data without requiring authentication
  4. Check for exposed input handling endpoints
    Review the application's entry points (index.php, ajax handlers, API endpoints) for code that accepts serialized data from users. Determine if these endpoints are accessible without login or authentication tokens.
    Affected if Deserialization endpoints are accessible to unauthenticated users

A user is affected if Reisen CMS version 1.4.1 or below is installed AND the application deserializes unauthenticated user input without 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 a version newer than 1.4.1 if available, or implement input validation/sanitization to prevent unsafe deserialization of user-controlled data.

Recommended fix Moderate confidence

Latest available version of Reisen theme (version > 1.4.1)

  1. 1. Identify the exact version of the Reisen theme currently installed on the WordPress site.
  2. 2. Check the official theme repository or the theme developer's website for the latest available version.
  3. 3. Before upgrading, create a complete backup of the WordPress site including files and database.
  4. 4. Test the upgrade in a staging environment to verify compatibility with existing plugins and content.
  5. 5. Upgrade the Reisen theme to the latest version available (version higher than 1.4.1).
  6. 6. Verify the fix was applied by checking the theme version after upgrade.
Caveat Check theme changelog for any breaking changes or CSS/template modifications that may require adjustments after upgrade

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

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
32.0 hours of engineering $5,600
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Scan for this in your stack

Free · runs locally
dbcve dependency scanner

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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-2025-69111 in production — separate from our analysis above.

No notes yet

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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
  • 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