CVE-2021-39163

🗓️ 31 Aug 2021 16:00:11Reported by GitHub_MType

cve🔗 web.nvd.nist.gov👁 138 Views🌐 WEB

Matrix 1.41.0 and prior allows unauthorized access to room inf

Reporter	Title	Published	Views	Family All 28
FreeBSD	py-matrix-synapse -- several vulnerabilities	31 Aug 202100:00	–	freebsd
AlpineLinux	CVE-2021-39163	31 Aug 202116:00	–	alpinelinux
Circl	CVE-2021-39163	31 Aug 202120:33	–	circl
CNNVD	Matrix 信息泄露漏洞	31 Aug 202100:00	–	cnnvd
CNVD	Matrix Information Disclosure Vulnerability (CNVD-2021-70122)	2 Sep 202100:00	–	cnvd
Cvelist	CVE-2021-39163 Adding a private/unlisted room to a community exposes room metadata in an unauthorised manner.	31 Aug 202116:00	–	cvelist
Debian CVE	CVE-2021-39163	31 Aug 202116:00	–	debiancve
EUVD	EUVD-2021-0131	7 Oct 202500:30	–	euvd
Fedora	[SECURITY] Fedora 35 Update: matrix-synapse-1.41.1-1.fc35	24 Sep 202120:41	–	fedora
Fedora	[SECURITY] Fedora 34 Update: matrix-synapse-1.41.1-1.fc34	8 Sep 202115:07	–	fedora

NVD

Vulners

Node

matrix synapseRange<1.41.1

Node

fedoraproject fedoraMatch34

fedoraproject fedoraMatch35

[
  {
    "product": "synapse",
    "vendor": "matrix-org",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.41.1"
      }
    ]
  }
]

Source	Link
github	www.github.com/matrix-org/synapse/releases/tag/v1.41.1
lists	www.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2VHDEPCZ22GJFMZCWA2XZAGPOEV72POF/
lists	www.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXT7ID7DNBRN2TVTETU3SYQHJKEG6PXN/
github	www.github.com/matrix-org/synapse/security/advisories/GHSA-jj53-8fmw-f2w2
github	www.github.com/matrix-org/synapse/commit/cb35df940a

Parameter	Position	Path	Description	CWE
group_id	path	/_matrix/client/r0/groups/{group_id}/rooms	Unauthorized access to group room metadata (name, avatar, topic, member count) via knowing a group's ID on vulnerable homeservers.	CWE-863, CWE-200
group_id	path	/_matrix/client/unstable/groups/{group_id}/rooms	Unauthorized access to group room metadata (name, avatar, topic, member count) via knowing a group's ID on vulnerable homeservers.	CWE-863, CWE-200

17 Jun 2026 04:03Current

3.7Low risk

Vulners AI Score3.7

CVSS 3.13.1

CVSS 23.5

EPSS0.00892