CVE-2021-32659
medium
CVSS v3
—
CVSS v4 NEW
—
VIR risk
5.5
Description
Automatic room upgrade handling can be used maliciously to bridge a room non-consentually
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 0.27.0-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| npm | matrix-appservice-bridge | <2.6.1 | 2.6.1 |
References
- https://security.archlinux.org/ASA-202106-51
- https://github.com/matrix-org/matrix-appservice-bridge/security/advisories/GHSA-35g4-qx3c-vjhx
- https://nvd.nist.gov/vuln/detail/CVE-2021-32659
- https://github.com/matrix-org/matrix-appservice-bridge/pull/330
- https://github.com/matrix-org/matrix-appservice-bridge/commit/b69e745584a34fcfd858df33e4631e420da07b9f
- https://github.com/matrix-org/matrix-appservice-bridge/releases/tag/2.6.1
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.