CVE-2025-6216

CRITICAL NUCLEI

Allegra 7.0.0-7.5.2.70 - Unauthenticated Authentication Bypass via Password Recovery Token

Title source: llm

Exploitation Summary

CVE-2025-6216 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.

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.

Nuclei Templates (1)

Allegra - Authentication Bypass via Predictable Password Reset Token

CRITICALVERIFIEDby iamnoooob,pdresearch

Shodan: http.favicon.hash:"284403119"

FOFA: icon_hash="284403119"

References (2)

Core 2

Core References

Third Party Advisory x_research-advisory

https://www.zerodayinitiative.com/advisories/ZDI-25-410/

Vendor Advisory vendor-advisory

https://alltena.com/en/resources/release-notes/release-notes-for-release-8-1-4-and-release-7-5-2

Scores

CVSS v3 9.8

EPSS 0.2943

EPSS Percentile 97.9%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-640

Status published

Products (1)

alltena/allegra 7.0.0 - 7.5.2.70

Published Jun 21, 2025

Tracked Since Feb 18, 2026