CVE-2025-6216

Allegra calculateTokenExpDate Password Recovery Authentication Bypass Vulnerability

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.

Affected

Allegra

CVSS v3.0 TRENDMICRO

9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

47.77% chance of exploitation in the next 30 days, 99th percentile

Nuclei

critical · CWE-640

Published

2025-06-21

Updated

2025-06-23

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/code/cves/2025/CVE-2025-6216.yaml

Security advisories

• https://alltena.com/en/resources/release-notes/release-notes-for-release-8-1-4-and-releas…
• https://www.zerodayinitiative.com/advisories/ZDI-25-410

References

• CVE Record
• NVD entry