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AllegraApplication · Alltena

CVE-2025-3486

HIGH · 8.8 CVSS v3.1 Published 2025-05-22
Fix available
A fix is available. Upgrade to 8.1.2 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable 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
Allegra isZipEntryValide Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Allegra. Authentication is required to exploit this vulnerability. The specific flaw exists within the implementation of the isZipEntryValide method. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of LOCAL SERVICE. Was ZDI-CAN-25730.

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

Directory traversal vulnerability in the isZipEntryValide method of Allegra allows authenticated attackers to manipulate file paths using '../' sequences to access arbitrary directories, leading to remote code execution in the context of LOCAL SERVICE due to lack of proper validation of user-supplied paths prior to file operations.

MitigationApply vendor patch when available; implement strict path validation including path canonicalization, allowlist-based directory validation, and filtering of '../' sequences in the isZipEntryValide method.

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
AllegraApplication
Affected:< 8.1.2

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
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/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 Allegra installation and version
    Check for Allegra installation directories (commonly in /opt/allegra, C:\Program Files\Allegra, or similar). Look for version file or check the application binary/version info. Compare the installed version number to the affected range: versions prior to 8.1.2 are vulnerable.
    Affected if Allegra is installed and version is below 8.1.2
  2. Locate isZipEntryValide method usage
    Search application source code, libraries, or JAR files for references to 'isZipEntryValide' or 'isZipEntryValid'. Check if the method is invoked during zip file processing operations.
    Affected if The isZipEntryValide method exists in the installed version and is callable by authenticated users
  3. Verify authenticated user access exists
    Review user authentication configuration and，确认是否存在可以使用zip上传/处理功能的已认证用户账户。检查用户权限级别。
    Affected if Authenticated users can access features that invoke the vulnerable method (zip file upload, import, or processing)
  4. Check for directory traversal in file operations
    Inspect application logs, web server logs, or file access audit logs for patterns containing '../' or absolute path sequences in zip entry names. Look for unusual file read/write attempts.
    Affected if Logs show zip entries with '../' sequences or access to files outside expected directories

A user is affected if Allegra version is below 8.1.2, the isZipEntryValide method is in use, and authenticated users can trigger zip file processing operations.

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
Upgrade available Upgrade to 8.1.2 or later
Fixed in 8.1.2
Interim mitigation

Apply vendor patch when available; implement strict path validation including path canonicalization, allowlist-based directory validation, and filtering of '../' sequences in the isZipEntryValide method.

Recommended fix Moderate confidence

Allegra 8.1.2

  1. Identify the current Allegra installation version
  2. Download Allegra version 8.1.2 or later from the official vendor
  3. Backup the current Allegra configuration and database
  4. Stop the Allegra service
  5. Install the updated Allegra version 8.1.2
  6. Verify the isZipEntryValide method now properly validates user-supplied paths
  7. Start the Allegra service
  8. Confirm the application functions normally post-upgrade
Caveat Standard upgrade precautions apply (backup before upgrading); the patch is a security fix with no expected functional breaking changes

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

Fix this in Allegra Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
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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-2025-3486 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
  • 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