CVE Explorer
CVE-2025-66558
Nextcloud Twofactor WebAuthn is the WebAuthn Two-Factor Provider for Nextcloud. Prior to 1.4.2 and 2.4.1, a missing ownership check allowed an attack to take-away a 2FA webauthn device when correctly guessing a 80-128 character long random string of letters, numbers and symbols. The victim would then be prompted to register a new device on the next login. The attacker can not authenticate as the victim. This vulnerability is fixed in 1.4.2 and 2.4.1.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"security-advisories","vendor":"nextcloud","versions":[{"status":"affected","version":"< 1.4.2"},{"status":"affected","version":">= 2.0.0-beta.1, < 2.4.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:06e892f7db8112dcc59b7bec1922f548fd8d93768382e06cca25eb68def10b44 · sha256:60a6d1aa4e80a6be… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.1,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:06e892f7db8112dcc59b7bec1922f548fd8d93768382e06cca25eb68def10b44 · sha256:60a6d1aa4e80a6be… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:06e892f7db8112dcc59b7bec1922f548fd8d93768382e06cca25eb68def10b44 · sha256:60a6d1aa4e80a6be… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fr8x-mvjg-wf9q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fr8x-mvjg-wf9q"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:06e892f7db8112dcc59b7bec1922f548fd8d93768382e06cca25eb68def10b44 · sha256:60a6d1aa4e80a6be… · /containers/cna/references/0
{"name":"https://github.com/nextcloud/twofactor_webauthn/commit/5d2302166d31ee2e01b2e21556bd5372156da13d","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/twofactor_webauthn/commit/5d2302166d31ee2e01b2e21556bd5372156da13d"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:06e892f7db8112dcc59b7bec1922f548fd8d93768382e06cca25eb68def10b44 · sha256:60a6d1aa4e80a6be… · /containers/cna/references/2
{"name":"https://github.com/nextcloud/twofactor_webauthn/pull/881","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/twofactor_webauthn/pull/881"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:06e892f7db8112dcc59b7bec1922f548fd8d93768382e06cca25eb68def10b44 · sha256:60a6d1aa4e80a6be… · /containers/cna/references/1
{"name":"https://hackerone.com/reports/3360354","tags":["x_refsource_MISC"],"url":"https://hackerone.com/reports/3360354"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:06e892f7db8112dcc59b7bec1922f548fd8d93768382e06cca25eb68def10b44 · sha256:60a6d1aa4e80a6be… · /containers/cna/references/3
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.