Vulnerability in Allegra
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.478 (98.8th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.351 · newest: 0.478 · change: +0.126
Affected products
- Allegra — versions 8.1.3.32
- Alltena Allegra
Weakness classification (CWE)
References
- www.zerodayinitiative.com/advisories/ZDI-25-410/ (x_research-advisory, Third Party Advisory)
- alltena.com/en/resources/release-notes/release-notes-for-release-8-1-4-and-rele… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-6216?
- CVE-2025-6216 is a critical-severity vulnerability in Allegra, classified under Weak Password Recovery Mechanism for Forgotten Password. CVSS score: 9.8/10. Published 2025-06-21.
- How severe is CVE-2025-6216?
- Critical severity. CVSS v3 base score is 9.8 out of 10.