# CVE-2025-65795: usememos memos incorrect access control in user registration API

Source: https://junglewise.ai/threats/cve-2025-65795-usememos-memos-incorrect-access-control-in-user-registration-api  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-08. Updated: 2026-07-05  
License: CC BY 4.0 with a link back

CVE-2025-65795 · Severity: high · CVSS 7.5 · Published 2025-12-08

A vulnerability in the Memos note-taking application allows unauthorized individuals to create new user accounts even when the administrator has disabled public registration. This flaw bypasses intended security settings, potentially allowing attackers to gain a foothold in the system. Once an account is created, it can be used as a starting point for further attacks, such as unauthorized data access or system compromise.

Technologies: [github.com/usememos/memos (Go)](https://junglewise.ai/threats/technologies/github-com-usememos-memos), [Usememos Memos](https://junglewise.ai/threats/technologies/memos). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [Usememos](https://junglewise.ai/threats/vendors/usememos).

## Quick answers

**Is CVE-2025-65795 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-65795 being exploited in the wild.

**How severe is CVE-2025-65795?** High severity, with a CVSS score of 7.5, published 8 December 2025.

**Which products and versions are affected?** github.com/usememos/memos (Go) SEMVER:introduced=0,fixed=0.25.3; Usememos Memos 0.25.2.

**Is there a fix for CVE-2025-65795?** Yes. github.com/usememos/memos (Go): upgrade to 0.25.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2025-65795 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2025-65795?** Check whether you run github.com/usememos/memos (Go) or Usememos Memos at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/usememos/memos (Go): upgrade to 0.25.3 or later

  ```sh
  go get github.com/usememos/memos@v0.25.3
  ```


## Technical details

A broken access control vulnerability exists in the REST API of usememos memos v0.25.2. The application fails to enforce the 'Disallow user registration' administrative setting within the `/api/v1/users` endpoint. An unauthenticated remote attacker can bypass the frontend registration restrictions by sending a direct POST request to the API with a chosen username and password. This allows for unauthorized account creation, which can subsequently be leveraged to perform authenticated-only attacks, such as arbitrary file writes or account takeovers. The issue was addressed in version 0.25.3 by adding authorization checks to the user registration service.

## Affected products

- usememos memos 0.25.2

## Identifiers

- CVE-2025-65795
- GHSA-mg56-wc4q-rw4w
- GO-2025-4217

## Timeline

- 2025-11-03: disclosed: First contact with vendor by researcher
- 2025-11-04: other: Pull request submitted
- 2025-11-06: patched: Fix merged to main branch
- 2025-11-25: other: Version 0.25.3 released
- 2025-12-03: advisory: Researcher advisory published
- 2025-12-08: other: CVE published to NVD

## References

- [http://usememos.com/](http://usememos.com/)
- [https://github.com/usememos/memos/pull/5217](https://github.com/usememos/memos/pull/5217)
- [https://herolab.usd.de/usd-2025-0058/](https://herolab.usd.de/usd-2025-0058/)

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