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CVE-2021-29471

🗓️ 11 May 2021 15:05:12Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov📰️ 2 Media mentions👁 154 Views

Synapse Matrix homeserver before 1.33.2 allows denial-of-service via crafted "Push rules" leading to poor performance

Related
Detection
Affected
Refs
Social
ReporterTitlePublishedViews
Family
freebsd
FreeBSD
py-matrix-synapse -- malicious push rules may be used for a denial of service attack.
11 May 202100:00
–freebsd
attackerkb
attackerkb
CVE-2021-29471
11 May 202115:15
–attackerkb
alpinelinux
AlpineLinux
CVE-2021-29471
11 May 202115:05
–alpinelinux
archlinux
ArchLinux
[ASA-202105-19] matrix-synapse: denial of service
25 May 202100:00
–archlinux
bdu_fstec
BDU FSTEC
Synapse push rules Resource Consumption DoS
20 Sep 202100:00
–bdu_fstec
cnnvd
CNNVD
Synapse security feature vulnerability
11 May 202100:00
–cnnvd
cvelist
Cvelist
CVE-2021-29471 Denial of service in Matrix Synapse
11 May 202115:05
–cvelist
debiancve
Debian CVE
CVE-2021-29471
11 May 202115:05
–debiancve
euvd
EUVD
EUVD-2021-0127
7 Oct 202500:30
–euvd
fedora
Fedora
[SECURITY] Fedora 34 Update: matrix-synapse-1.38.1-1.fc34
2 Aug 202101:05
–fedora
Rows per page
NVD
Vulners
Node
matrixsynapseRange<1.33.2
[
  {
    "product": "synapse",
    "vendor": "matrix-org",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.33.2"
      }
    ]
  }
]

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17 Jun 2026 03:47Current
4.8Medium risk
Vulners AI Score4.8
CVSS 25
CVSS 3.13.7 - 5.3
EPSS0.01647
154