CVE-2021-21392

Katalog CVE

CVSS 6.3 · Medium EPSS 0,94%

Kerentanan URL Redirection to Untrusted Site ('Open Redirect') pada matrix synapse, fedoraproject fedora. Skor CVSS 3.1 6.3 (Medium) menurut NVD.

Deskripsi (NVD)

Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 requests to user provided domains were not restricted to external IP addresses when transitional IPv6 addresses were used. Outbound requests to federation, identity servers, when calculating the key validity for third-party invite events, sending push notifications, and generating URL previews are affected. This could cause Synapse to make requests to internal infrastructure on dual-stack networks. See referenced GitHub security advisory for details and workarounds.

Rincian

Terbit di NVD

12 April 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

6.3 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

EPSS (30 hari)

0,94% peluang dieksploitasi; lebih tinggi dari 60,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/matrix-org/synapse/pull/9240 patch · advisory pihak ketiga
• https://github.com/matrix-org/synapse/security/advisories/GHSA-5wrh-4jwv-5w78 patch · advisory pihak ketiga
• https://pypi.org/project/matrix-synapse/ product · advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM...