CVE-2025-6216

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.

Score

CVSS 3.0 9.8 Critical

Status

Analyzed - zdi-disclosures@trendmicro.com

Published

2025-06-21

Last modified

2025-06-23

Weaknesses

CWE-640

Affected products

• Allegra (Allegra)
• Allegra (Alltena)

References

• https://alltena.com/en/resources/release-notes/release-notes-for-release-8-1-4-and-release-7-5-2
• https://www.zerodayinitiative.com/advisories/ZDI-25-410/