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AllegraApplication · Alltena

CVE-2025-6216

CRITICAL · 9.8 CVSS v3.0 Published 2025-06-21
Fix available
A fix is available. Upgrade to 7.5.2.70 / 8.1.24 or later.
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
Allegra calculateTokenExpDate Password Recovery Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of Allegra. Authentication is not required to exploit this vulnerability. The specific flaw exists within the password recovery mechanism. The issue results from reliance upon a predictable value when generating a password reset token. An attacker can leverage this vulnerability to bypass authentication on the application. Was ZDI-CAN-27104.

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

The vulnerability exists in Allegra's password recovery mechanism where password reset tokens are generated using a predictable value rather than cryptographically secure randomness. This allows remote attackers to forge or guess valid password reset tokens and bypass authentication entirely.

MitigationImplement cryptographically secure pseudo-random number generation (CSPRNG) for password reset tokens with sufficient entropy, add rate limiting on password reset requests, and invalidate any existing predictable tokens.

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:>= 7.0.0, < 7.5.2.70>= 8.0.0, < 8.1.24

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:3.0/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 installed Allegra version
    Locate the Allegra installation directory and check the version file or use the application's admin interface to view version information. Common locations include a version file in the installation root or the 'About' section in the admin panel.
    Affected if The installed version falls within 7.0.0 to 7.5.2.70 (exclusive of 7.5.2.70) or 8.0.0 to 8.1.24 (exclusive of 8.1.24).
  2. Confirm password reset feature is enabled
    Access the application's authentication configuration or admin settings to verify whether the 'Forgot Password' or password reset functionality is enabled and accessible to users.
    Affected if Password reset functionality is enabled and publicly accessible to unauthenticated users.
  3. Check application exposure
    Determine if the Allegra web interface is exposed to untrusted networks or the internet, as this is a remote authentication bypass vulnerability.
    Affected if The Allegra instance is accessible from untrusted networks or the public internet without additional authentication barriers.
  4. Review authentication logs for anomalies
    Examine server and application logs for unusual password reset requests, particularly multiple reset attempts from single IP addresses or patterns suggesting token guessing.
    Affected if Logs show unusual patterns in password reset requests such as high volume from specific sources or sequential token generation attempts.

You are affected if Allegra is running a version within 7.0.0 to 7.5.2.70 or 8.0.0 to 8.1.24 AND the password reset feature is enabled and accessible to attackers.

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 7.5.2.70 / 8.1.24 or later
Fixed in 7.5.2.708.1.24
Interim mitigation

Implement cryptographically secure pseudo-random number generation (CSPRNG) for password reset tokens with sufficient entropy, add rate limiting on password reset requests, and invalidate any existing predictable tokens.

Recommended fix High confidence

Allegra version 7.5.2.70+ (for 7.x branch) or 8.1.24+ (for 8.x branch)

  1. 1. Identify the currently installed Allegra version by checking the application's about page or system information
  2. 2. If running version 7.0.0 through 7.5.2.69, plan upgrade to version 7.5.2.70 or later
  3. 3. If running version 8.0.0 through 8.1.23, plan upgrade to version 8.1.24 or later
  4. 4. Create a complete backup of the Allegra database and configuration files before proceeding
  5. 5. Download the appropriate fixed version from the official vendor (alltena.com) or authorized distribution channel
  6. 6. Follow vendor-provided upgrade instructions to install the new version
  7. 7. After upgrade, verify the application is running the fixed version
  8. 8. Test the password recovery functionality to confirm the token generation now uses unpredictable values
Caveat Review vendor release notes for the specific version upgrade; minor version upgrades within the same major version typically have minimal breaking changes

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

Fix this in Allegra Scoped from the published advisory
  • Consultation2.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,800
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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-2025-6216 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