# CVE-2025-65781: Denial of service in n/a

> Attackers can cause denial of service and potential identity spoofing by sending non-empty bearer tokens to the attachment upload API.

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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:** 15 Dec 2025
- **Updated:** 16 Dec 2025
- **Also known as:** GHSA-j27j-25gc-gv9v

## What is CVE-2025-65781?

CVE-2025-65781 is a high-severity denial of service vulnerability in n/a, published on 15 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16. Attachment upload API treats the Authorization bearer value as a userId and enters a non-terminating body-handling branch for any non-empty bearer token, enabling trivial application-layer DoS and latent identity-spoofing.

Weakness: CWE-400 (Uncontrolled Resource Consumption), CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2025-65781?

It affects 1 product.


Products: Wekan Project Wekan.

## How do I fix CVE-2025-65781?

No fix has been published for CVE-2025-65781 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-65781 being exploited?

There is no known exploitation of CVE-2025-65781 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2026-30843](https://insights.sbomify.com/CVE-2026-30843/): Wekan has Cross-Board IDOR in Custom Fields Update Endpoints (critical 9.3)
- [CVE-2026-30844](https://insights.sbomify.com/CVE-2026-30844/): Wekan Vulnerable to SSRF through Lack of Validation or Filtering in Attachment URL Loading (critical 9.3)
- [CVE-2026-30847](https://insights.sbomify.com/CVE-2026-30847/): Wekan Credential Leak via notificationUsers Publication Exposes Password Hashes and Session Tokens (critical 9.3)
- [CVE-2025-65780](https://insights.sbomify.com/CVE-2025-65780/): Missing authorization in n/a (high 8.8)
- [CVE-2026-30846](https://insights.sbomify.com/CVE-2026-30846/): Wekan Exposes All Global Webhook Integrations through globalwebhooks Publication (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-65781 and fix it if it is affected.

What it is: CVE-2025-65781 is a high-severity denial of service vulnerability in n/a, published on 15 Dec 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-2025-65781 in the wild and no public exploit code.

Affected product: n/a. 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-2025-65781/ (Markdown: https://insights.sbomify.com/CVE-2025-65781/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-65781
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-65781
- OSV: https://osv.dev/vulnerability/CVE-2025-65781

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-65781/
Summaries are generated and may contain mistakes; the official description above is the record.