CVE Details
CVE-2023-49105
ownCloud Improper Authentication Vulnerability
Published: 2026-08-27
CVSS: 9.8 CRITICAL
Product: ownCloud ownCloud
Due Date: 2026-08-30
ownCloud contains an improper authentication vulnerability that allows an attacker to access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured.
GitHub PoC
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FIRST EPSS
EPSS estimates the probability of exploitation in the next 30 days. Higher values indicate higher likelihood of real-world exploitation.
Timeline
CVE Stalker
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MITRE
GitHub
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References
Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | cveId | CVE-2023-49105 |
| cveMetadata > | assignerOrgId | 8254265b-2729-46b6-b9e3-3dfca2d5bfca |
| cveMetadata > | assignerShortName | mitre |
| cveMetadata > | dateUpdated | 2026-08-27T18:44:40.826Z |
| cveMetadata > | dateReserved | 2023-11-21T00:00:00.000Z |
| cveMetadata > | datePublished | 2023-11-21T00:00:00.000Z |
| containers > | cna > providerMetadata > orgId | 8254265b-2729-46b6-b9e3-3dfca2d5bfca |
| containers > | cna > providerMetadata > shortName | mitre |
| containers > | cna > providerMetadata > dateUpdated | 2023-11-21T21:25:15.077Z |
| containers > | cna > descriptions > 0 > lang | en |
| containers > | cna > descriptions > 0 > value | An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no signing-key is configured for the owner of the files. The earliest affected version is 10.6.0. |
| containers > | cna > affected > 0 > vendor | n/a |
| containers > | cna > affected > 0 > product | n/a |
| containers > | cna > affected > 0 > versions > 0 > version | n/a |
| containers > | cna > affected > 0 > versions > 0 > status | affected |
| containers > | cna > references > 0 > url | https://owncloud.org/security |
| containers > | cna > references > 1 > url | https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/ |
| containers > | cna > metrics > 0 > cvssV3_1 > version | 3.1 |
| containers > | cna > metrics > 0 > cvssV3_1 > vectorString | CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N |
| containers > | cna > metrics > 0 > cvssV3_1 > attackVector | NETWORK |
| containers > | cna > metrics > 0 > cvssV3_1 > attackComplexity | LOW |
| containers > | cna > metrics > 0 > cvssV3_1 > privilegesRequired | NONE |
| containers > | cna > metrics > 0 > cvssV3_1 > userInteraction | NONE |
| containers > | cna > metrics > 0 > cvssV3_1 > scope | UNCHANGED |
| containers > | cna > metrics > 0 > cvssV3_1 > confidentialityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > integrityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > availabilityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > baseScore | 9.8 |
| containers > | cna > metrics > 0 > cvssV3_1 > baseSeverity | CRITICAL |
| containers > | cna > problemTypes > 0 > descriptions > 0 > type | text |
| containers > | cna > problemTypes > 0 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 0 > descriptions > 0 > description | n/a |
| containers > | adp > 0 > providerMetadata > orgId | af854a3a-2127-422b-91ae-364da2661108 |
| containers > | adp > 0 > providerMetadata > shortName | CVE |
| containers > | adp > 0 > providerMetadata > dateUpdated | 2024-08-02T21:46:29.148Z |
| containers > | adp > 0 > title | CVE Program Container |
| containers > | adp > 0 > references > 0 > url | https://owncloud.org/security |
| containers > | adp > 0 > references > 0 > tags > 0 | x_transferred |
| containers > | adp > 0 > references > 1 > url | https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/ |
| containers > | adp > 0 > references > 1 > tags > 0 | x_transferred |
| containers > | adp > 1 > problemTypes > 0 > descriptions > 0 > type | CWE |
| containers > | adp > 1 > problemTypes > 0 > descriptions > 0 > cweId | CWE-287 |
| containers > | adp > 1 > problemTypes > 0 > descriptions > 0 > lang | en |
| containers > | adp > 1 > problemTypes > 0 > descriptions > 0 > description | CWE-287 Improper Authentication |
| containers > | adp > 1 > references > 0 > url | https://hunt.io/blog/chinese-speaking-operator-philippine-nuclear-naval-contractor |
| containers > | adp > 1 > references > 0 > tags > 0 | third-party-advisory |
| containers > | adp > 1 > references > 1 > url | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-49105 |
| containers > | adp > 1 > references > 1 > tags > 0 | government-resource |
| containers > | adp > 1 > metrics > 0 > other > type | ssvc |
| containers > | adp > 1 > metrics > 0 > other > content > timestamp | 2026-08-27T17:44:05.938842Z |
| containers > | adp > 1 > metrics > 0 > other > content > id | CVE-2023-49105 |
| containers > | adp > 1 > metrics > 0 > other > content > options > 0 > Exploitation | active |
| containers > | adp > 1 > metrics > 0 > other > content > options > 1 > Automatable | yes |
| containers > | adp > 1 > metrics > 0 > other > content > options > 2 > Technical Impact | total |
| containers > | adp > 1 > metrics > 0 > other > content > role | CISA Coordinator |
| containers > | adp > 1 > metrics > 0 > other > content > version | 2.0.3 |
| containers > | adp > 1 > title | CISA ADP Vulnrichment |
| containers > | adp > 1 > providerMetadata > orgId | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| containers > | adp > 1 > providerMetadata > shortName | CISA-ADP |
| containers > | adp > 1 > providerMetadata > dateUpdated | 2026-08-27T18:44:40.826Z |