{"id":"CVE-2025-51846","aliases":["EUVD-2025-209596","GHSA-jmrh-f3j8-q3c4"],"status":"published","title":"CryptPad unbounded WebSocket frame flood","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.","severity":{"version":"4.0","score":8.7,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00578,"percentile":0.48097,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-770"],"published":"2026-04-30T16:35:59Z","modified":"2026-10-28T02:31:12Z","exploits":[{"source":"pocgithub","id":"JohnPerifanis/cryptpad-cve-2025-51846-advisory","title":"JohnPerifanis/cryptpad-cve-2025-51846-advisory","date":"2026-04-22","url":"https://github.com/JohnPerifanis/cryptpad-cve-2025-51846-advisory"}],"products":[{"vendor":"cryptpad","product":"cryptpad"},{"vendor":"xwiki","product":"cryptpad"}],"references":[{"url":"https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9730ec2693320c62e","tags":["Patch","web"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-51846","tags":["Third Party Advisory","web"]},{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-119-01.json","tags":["Third Party Advisory","web"]},{"url":"https://github.com/JohnPerifanis/cryptpad-cve-2025-51846-advisory/blob/main/README.md","tags":["Exploit","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-51846","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-jmrh-f3j8-q3c4"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/51xxx/CVE-2025-51846.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-51846","title":"CryptPad unbounded WebSocket frame flood","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.","status":"published","published":"2026-04-30T16:35:59.625Z","modified":"2026-04-30T17:15:30.109Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:32:30.302289Z"}],"euvd":[{"id":"EUVD-2025-209596","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.","status":"published","published":"2026-04-30T16:35:59Z","modified":"2026-04-30T17:15:30Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high"}],"updated_at":"2026-11-02T19:05:19.116327Z"}],"ghsa":[{"id":"GHSA-jmrh-f3j8-q3c4","title":"CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can...","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.","status":"published","published":"2026-04-30T18:30:32Z","modified":"2026-04-30T18:30:38Z","cvss":[{"version":"4.0","score":8.7,"vector":"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:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:07:52.236911Z"}],"nvd":[{"id":"CVE-2025-51846","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.","status":"published","published":"2026-04-30T17:16:25.467Z","modified":"2026-10-14T13:10:00.187Z","cvss":[{"version":"4.0","score":8.7,"vector":"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:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:02.090779Z"}],"osv":[{"id":"CVE-2025-51846","title":"CryptPad unbounded WebSocket frame flood","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.","status":"published","published":"2026-04-30T16:35:59.625Z","modified":"2026-10-28T02:31:12.541760183Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:44:50.45326Z"}]}}