1. Home
  2. Vulnerabilities
  3. CVE-2025-6216
9.8
CRITICAL CVSS 3.0
CVE-2025-6216
Allegra calculateTokenExpDate Password Recovery Authentication Bypass Vulnerability
Description

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.

INFO

Published Date :

June 21, 2025, 1:15 a.m.

Last Modified :

Aug. 18, 2025, 3:58 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-6216 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Alltena allegra
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.0 CRITICAL [email protected]
Solution
Apply vendor-provided security updates to fix the authentication bypass vulnerability.
  • Update Allegra to the latest version.
  • Ensure password recovery mechanism is secured.
  • Monitor for unauthorized access attempts.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-6216.

URL Resource
https://alltena.com/en/resources/release-notes/release-notes-for-release-8-1-4-and-release-7-5-2 Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-25-410/ Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-6216 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-6216 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-6216 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-6216 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Aug. 18, 2025

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:alltena:allegra:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (excluding) 7.5.2.70 *cpe:2.3:a:alltena:allegra:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.1.24
    Added Reference Type Zero Day Initiative: https://alltena.com/en/resources/release-notes/release-notes-for-release-8-1-4-and-release-7-5-2 Types: Vendor Advisory
    Added Reference Type Zero Day Initiative: https://www.zerodayinitiative.com/advisories/ZDI-25-410/ Types: Third Party Advisory
  • New CVE Received by [email protected]

    Jun. 21, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-640
    Added Reference https://alltena.com/en/resources/release-notes/release-notes-for-release-8-1-4-and-release-7-5-2
    Added Reference https://www.zerodayinitiative.com/advisories/ZDI-25-410/
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact