ownCloud: Mehrere Schwachstellen
WID-SEC-2023-2985 · first 22.11.2023 · updated 28.08.2026 · CVSS 10,0
What it is about
ownCloud ist eine "on-premise" Plattform für Dateifreigabe und Zusammenarbeit. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in ownCloud ausnutzen, um Informationen offenzulegen, Sicherheitsvorkehrungen zu umgehen und Dateien zu manipulieren.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- Informationen offenzulegen
- Sicherheitsvorkehrungen zu umgehen
- Dateien zu manipulieren
Am I affected?
Affected according to the BSI:
- ownCloud ownCloud <graphapi 0.3.1
- ownCloud ownCloud <oauth2 0.6.1
- ownCloud ownCloud <10.13.1
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- ownCloud ownCloud graphapi 0.3.1
- ownCloud ownCloud oauth2 0.6.1
- ownCloud ownCloud 10.13.1
Is the vulnerability already being exploited?
- CVE-2023-49105: exploited in the wild according to CISA, in the catalogue since 27.08.2026.
- CVE-2023-49103: exploited in the wild according to CISA, in the catalogue since 30.11.2023.
- According to a CISA advisory, used by actors from : 2023 Top Routinely Exploited Vulnerabilities (11/2024)
Information and sources
- Original BSI advisory (WID)
- GitHub Advisory Database vom 2023-11-21 github.com
- GitHub Advisory Database vom 2023-11-21 github.com
- GitHub Advisory Database vom 2023-11-21 github.com
- ownCloud Security Advisory vom 2023-11-21 owncloud.com
- ownCloud Security Advisory vom 2023-11-21 owncloud.com
- ownCloud Security Advisory vom 2023-11-21 owncloud.com
- Greynoise Blog vom 2023-11-28 www.greynoise.io
- CISA KEV CVE-2023-49105 vom 2026-08-27 www.cisa.gov
CVE: CVE-2023-49103, CVE-2023-49104, CVE-2023-49105
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.