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EUVD-2021-0127

🗓️ 07 Oct 2025 00:30:54Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 19 Views

Synapse before version 1.33.2 allows poor performance in event matching, leading to denial-of-service.

Related
Affected
Refs
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
cve
CVE
CVE-2021-29471
11 May 202115:05
–cve
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
fedora
Fedora
[SECURITY] Fedora 34 Update: matrix-synapse-1.38.1-1.fc34
2 Aug 202101:05
–fedora
Rows per page
[
  {
    "enisaIdVendor": [
      {
        "id": "32f375ec-388f-39e3-b85d-09a8a5c00dd0",
        "vendor": {
          "name": "matrix-org"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "164ec1ab-303b-3943-afad-490f1fc49d48",
        "product": {
          "name": "synapse"
        },
        "product_version": "< 1.33.2"
      }
    ]
  }
]

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07 Oct 2025 00:30Current
6.3Medium risk
Vulners AI Score6.3
CVSS 3.13.7 - 5.3
CVSS 25
EPSS0.01647
19