by Kastro
Paper/Archive/CVE-2025-49591

CVE-2025-49591

cryptpad cryptpad — CryptPad 2FA Bypass Vulnerability

EPSS 0.5%public exploitCVSS 9.1
critical.is priorityof 100
46
CVSS 9.1 (NVD)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 44.1.441 × 208.8Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

CryptPad is a collaboration suite. Prior to version 2025.3.0, enforcement of Two-Factor Authentication (2FA) in CryptPad can be trivially bypassed, due to weak implementation of access controls. An attacker that compromises a user's credentials can gain access to the victim's account, even if the victim has 2FA set up. This is due to 2FA not being enforced if the path parameter is not 44 characters long, which can be bypassed by simply URL encoding a single character in the path. This issue has been patched in version 2025.3.0.

Affected

ProductAffectedFixed inSource
cryptpad< 2025.3.0–CNA

Scores by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub_M (CNA)7.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

refgithub.com/cryptpad/cryptpad/security/advisories/GHSA-xq5x-wgcm-3p33refgithub.com/cryptpad/cryptpad/commit/0c5d4bbf5e5206d53470ea86a664fa2b703fb611refgithub.com/cryptpad/cryptpad/commit/f624f9d457d36040f57c7598d98a8b9461b79837refgithub.com/cryptpad/cryptpad/blob/15c81aa8ccb737a9a1167481f4a699af331364bb/lib/http-worker.js#L356-L364