CryptPad unbounded WebSocket frame flood
Priority MEDIUM 44CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00578 47th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed CryptPad (CryptPad): 2026.2.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA CryptPad (CryptPad) Fixed in 2026.2.2
Timeline
- 2026-10-02 Threatist record created from CVE-2025-51846
- 2026-10-03 Alias added: GHSA-jmrh-f3j8-q3c4
More XWiki Cryptpad vulnerabilities
- TI-2025-31604 CryptPad 2FA Bypass Vulnerability CVSS 4.0HIGH 7.4
- TI-2025-31603 CryptPad Dom-Based Cross-Site Scripting (XSS) Vulnerability CVSS 4.0LOW 2.9
- TI-2019-11412 The pad management logic in XWiki labs CryptPad before 3.0.0 allows a remote attacker… CVSS 3.1MEDIUM 6.5
- TI-2017-14392 Cross-site scripting (XSS) vulnerability in pad export in XWiki labs CryptPad before… CVSS 3.0MEDIUM 6.1
Sources
- CVE-2025-51846 · CVE Program
- CVE-2025-51846 · NVD
- FIRST EPSS
- GHSA-jmrh-f3j8-q3c4 · GitHub Advisory Database · CC BY 4.0
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