CVE-2025-51846

EUVD-2025-209596
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 72%
Affected Products (NVD)
VendorProductVersion
xwikicryptpad
2025.3.1 ≤
𝑥
< 2026.2.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/JohnPerifanis/cryptpad-cve-2025-51846-advisory/blob/main/README.md
https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9730ec2693320c62e
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-119-01.json
https://www.cve.org/CVERecord?id=CVE-2025-51846