CVE-2025-51846

highpriority · track · 10EPSS 0.006 · 47 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.58% (47th) EPSS

CVSS 7.5 · high

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_it · nvd

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedcryptpadcisa_csaf_it
Fixed in 2026.2.2.
https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9730ec2693320c62e

cvss

Technical severity, 0–10. One row per scoring source.

8.7

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6

v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary

v4.07.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770USCWE-770US

exploits (1)

Public proof-of-concept and weaponised exploit code.

JohnPerifanis/cryptpad-cve-2025-51846-advisorySanitized advisory for CVE-2025-51846 affecting CryptPad WebSocket handling.PoC · poc_in_github

affected products (7)

Products and version ranges known to be affected.

CryptPad CryptPad 2026.2.2all versionsfixedcisa_csaf_itUS
CryptPad CryptPad >=2025.3.1|<2026.2.2all versionscisa_csaf_itUS
cryptpad cryptpadall versionsfixedcisa_csaf_itUS
cryptpad cryptpad2025.3.1| → 2026.2.2cisa_csaf_itUS
cryptpad cryptpad< 2026.2.2enisa_euvdEU
cryptpad cryptpad2025.3.1 → 2026.2.2enisa_euvdEU
xwiki cryptpad2025.3.1 → 2026.2.2nvdUScpe:2.3:a:xwiki:cryptpad:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

VA-26-119-01CryptPad unbounded WebSocket frame flood2026-04-29csaf · cisa_csaf_itUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_it nvd NVD CVE.org MITRE

published 2026-04-30modified 2026-06-17

references (10)

External citations — patches, advisories, analysis.

scry

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