Vulnerability details

CVE-2025-6216

Allegra Allegra

Allegra calculateTokenExpDate Password Recovery Authentication Bypass Vulnerability

CVSS 3.0

9.8Critical

Official 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.

CVSS scores

Score	Version	Source	Vector
9.8Critical	3.0	CVEProject cvelistV5 (CNA) (zdi)	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
Allegra	Allegra	8.1.3.32	CVEProject cvelistV5 (CNA)

References and advisories

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

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Details

Published: 2025-06-21
Last updated: 2025-06-23
State: Published
Assigner (CNA): zdi

Exploit prediction (EPSS)

47.77%

Probability of exploitation in 30 days

98.8%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-640
Weak Password Recovery Mechanism for Forgotten Password