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Vulnerability record · CVE-2025-51846 · published 30 April 2026

CVE-2025-51846: Xwiki cryptpad allocation without limits vulnerability

Xwiki · Cryptpad

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.

8.7 CVSS 4.0 High EPSS 0.58% · top 54.6% CWE-770 · Allocation without limits
8.7CVSS 4.0 base score
0.58%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS: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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/JohnPerifanis/cryptpad-cve-2025-51846-advisory/blob/main/README.md ExploitThird Party Advisory
https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9730ec2693320c62e Patch
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-119-01.json Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2025-51846 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.4CVE-2025-49591Xwiki cryptpad improper access control vulnerabilityCryptPad is a collaboration suite. Prior to version 2025.3.0, enforcement of Two-Factor Authentication (2FA) in CryptPad can be trivially bypassed, d…EPSS 0.52%6.5CVE-2019-15302Xwiki cryptpad improper resource shutdown vulnerabilityThe pad management logic in XWiki labs CryptPad before 3.0.0 allows a remote attacker (who has access to a Rich Text pad with editing rights for the …EPSS 1.4%6.1CVE-2017-1000051Xwiki cryptpad cross-site scripting vulnerabilityCross-site scripting (XSS) vulnerability in pad export in XWiki labs CryptPad before 1.1.1 allows remote attackers to inject arbitrary web script or …EPSS 1.2%2.9CVE-2025-49590Xwiki cryptpad vulnerabilityCryptPad is a collaboration suite. Prior to version 2025.3.0, the "Link Bouncer" functionality attempts to filter javascript URIs to prevent Cross-Si…EPSS 0.33%8.6CVE-2020-3569Cisco IOS XR DVMRP IGMP packet handling memory exhaustionCisco IOS XR Software mishandles IGMP packets in its Distance Vector Multicast Routing Protocol (DVMRP) feature, allowing crafted traffic to crash th…KEVEPSS 3.3%analysed8.6CVE-2020-3566Cisco IOS XR DVMRP IGMP queue flaw causes memory exhaustionCisco IOS XR Software mishandles queue management for IGMP packets in its DVMRP feature, allowing uncontrolled memory consumption. An unauthenticated…KEVEPSS 3.7%analysed

Source: NIST National Vulnerability Database (record CVE-2025-51846), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.