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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Xwiki Cryptpad
cpe:2.3:a:xwiki:cryptpad:*:*:*:*:*:*:*:*
|
2025.3.1
|
2026.2.2
|
References 4
https://github.com/JohnPerifanis/cryptpad-cve-2025-51846-advisory/blob/main/REA…
9119a7d8-5eab-497f-8521-727c672e3725
https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9…
9119a7d8-5eab-497f-8521-727c672e3725
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026…
9119a7d8-5eab-497f-8521-727c672e3725
https://www.cve.org/CVERecord?id=CVE-2025-51846
9119a7d8-5eab-497f-8521-727c672e3725