Home/CVE/CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade o
CVE

CVE-2025-51846

CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade o

CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade or deny service for all users of a CryptPad instance. Fixed in 2026.2.2.

HIGH · CVSS 7.5 EPSS 0.00711
Act now
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-770Allocation of Resources Without Limits or Throttling
▤

Affected Products & Versions

1
xwiki cryptpad>= 2025.3.1 and < 2026.2.2
⚠

Public Exploits & PoCs

1
pocgithub.com · README.mdgithub.com
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · 9119a7d8-5eab-497f-8521-727c672e3725
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Apr 2026 · 05:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-IT-white-2026-va-26-119-01
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9730ec2693320c62ePatch
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-119-01.jsonThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2025-51846Third Party Advisory
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