# CVE-2025-6216: Allegra calculateTokenExpDate Password Recovery Authentication Bypass Vulnerability

> Remote attackers can bypass authentication and take over accounts by exploiting predictable password reset tokens in Allegra.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Jun 2025
- **Updated:** 23 Jun 2025
- **Also known as:** GHSA-7jmp-283p-h6xj

## What is CVE-2025-6216?

CVE-2025-6216 is a critical authentication bypass vulnerability in Allegra, published on 21 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### 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.

Weakness: CWE-640 (Weak Password Recovery Mechanism for Forgotten Password)

## Which versions are affected by CVE-2025-6216?

It affects 1 product.


Products: Alltena Allegra.

## How do I fix CVE-2025-6216?

No fix has been published for CVE-2025-6216 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-6216 being exploited?

There is no known exploitation of CVE-2025-6216 in the wild and no public exploit code.

## Other vulnerabilities in Allegra

- [CVE-2023-51638](https://insights.sbomify.com/CVE-2023-51638/): Allegra Hard-coded Credentials Authentication Bypass Vulnerability (critical 9.8)
- [CVE-2023-51639](https://insights.sbomify.com/CVE-2023-51639/): Allegra downloadExportedChart Directory Traversal Authentication Bypass Vulnerability (critical 9.8)
- [CVE-2023-51641](https://insights.sbomify.com/CVE-2023-51641/): Allegra renderFieldMatch Deserialization of Unstrusted Data Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2023-51642](https://insights.sbomify.com/CVE-2023-51642/): Allegra loadFieldMatch Deserialization of Untrusted Data Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2023-51644](https://insights.sbomify.com/CVE-2023-51644/): Allegra SiteConfigAction Improper Access Control Remote Code Execution Vulnerability (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-6216 and fix it if it is affected.

What it is: CVE-2025-6216 is a critical authentication bypass vulnerability in Allegra, published on 21 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-6216 in the wild and no public exploit code.

Affected product: Allegra. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-6216/ (Markdown: https://insights.sbomify.com/CVE-2025-6216/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-6216
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-6216
- OSV: https://osv.dev/vulnerability/CVE-2025-6216

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-6216/
Summaries are generated and may contain mistakes; the official description above is the record.