CVE-2026-25615
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 · uneditedBlesta 3.x through 5.x before 5.13.3 allows object injection, aka CORE-5668.
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 confidenceBlesta versions 3.x through 5.x before 5.13.3 contains a PHP object injection vulnerability (CWE-502). This occurs when the application deserializes untrusted data without proper validation, potentially allowing an authenticated attacker to instantiate arbitrary PHP objects, leading to remote code execution or other malicious actions.
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>= 3.0.0, < 5.13.3CVSS 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
- Network
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/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 checksWork through these to decide whether this CVE applies to you.
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Identify the installed Blesta versionLocate the version file or check the admin dashboard. Common paths include /config/version.php or look for a version constant in the installation directory. The admin panel typically displays the version at the bottom or in system information.Affected if The version is 3.0.0 or higher but lower than 5.13.3
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Confirm the exact version numberOpen the version file or access system info through the admin panel. Record the full version string (e.g., 5.12.1, 4.8.0).Affected if The version falls within the range >= 3.0.0 and < 5.13.3
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Check for PHP deserialization usageSearch the Blesta installation for uses of PHP unserialize() function, particularly in user-facing or input-receiving code paths. Use grep or a file search to scan PHP files for 'unserialize' calls.Affected if The application deserializes data from untrusted sources without proper validation, which is required for this vulnerability to be exploitable
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Review input handling for untrusted dataExamine code paths that process user input, especially those that may feed into deserialization functions. Focus on controllers and models that handle form data, API requests, or uploaded files.Affected if User-supplied data reaches deserialization logic without sanitization, indicating the exploitation condition exists
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Verify authentication requirementsDetermine whether the vulnerable deserialization point is reachable by authenticated users only. Check the access controls on the identified code paths.Affected if The vulnerable code path is accessible to authenticated users, meaning an authenticated attacker could potentially exploit the flaw
You are affected if your installed Blesta version is 3.0.0 or higher but lower than 5.13.3 and your application deserializes untrusted input without validation.
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.
dbcve · scoped5.13.3
Upgrade Blesta to version 5.13.3 or later. Additionally, review code paths that handle deserialized data and implement input validation to prevent object injection attacks.
Blesta 5.13.3 or later
- 1. Back up your current Blesta installation and database.
- 2. Download Blesta version 5.13.3 or later from the official Blesta website (www.blesta.com).
- 3. Extract the upgrade package to your server.
- 4. Run the upgrade process following Blesta's standard upgrade procedure.
- 5. Verify the upgrade was successful by logging into the admin panel.
- 6. Test critical functionality to ensure the application operates normally.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,096.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-25615 — 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-2026-25615 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
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