CVE-2021-21333
MEDIUM6.1EPSS 0.39%HTML injection in email and account expiry notifications
發布日:2021/3/26修改日:2026/5/20
描述
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 1.27.0, the notification emails sent for notifications for missed messages or for an expiring account are subject to HTML injection. In the case of the notification for missed messages, this could allow an attacker to insert forged content into the email. The account expiry feature is not enabled by default and the HTML injection is not controllable by an attacker. This is fixed in version 1.27.0.
受影響套件(3)
- Debian/matrix-synapsefrom 0, < 1.27.0-1
- PyPI/matrix-synapsefrom 0, < 1.27.0
- PyPI/matrix-synapsefrom 0, < e54746bdf7d5c831eabe4dcea76a7626f1de73df | from 0, < 1.27.0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N |
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N |
參考連結(9)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-21333
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2021-21333
- PATCHhttps://github.com/matrix-org/synapse
- WEBhttps://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df
- WEBhttps://github.com/matrix-org/synapse/pull/9200
- WEBhttps://github.com/matrix-org/synapse/releases/tag/v1.27.0
- WEBhttps://github.com/matrix-org/synapse/security/advisories/GHSA-c5f8-35qr-q4fm
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2021-134.yaml
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY