CVE-2016-9464
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 1.6%
exploitation probability
1.6%top 25% of all CVEs
observed exploitation
nono source reports it
Nextcloud Server before 9.0.54 and 10.0.0 suffers from an improper authorization check on removing shares. The Sharing Backend as implemented in Nextcloud does differentiate between shares to users and groups. In case of a received group share, users should be able to unshare the file to themselves but not to the whole group. The previous API implementation simply unshared the file to all users in the group.
Affected products
n/a · Nextcloud Server Nextcloud Server before 9.0.54 and 10.0.0References
https://github.com/nextcloud/server/commit/3387e5d00fcf6b2ea6b285a091e5743f545e7202https://github.com/nextcloud/server/commit/7289cb5ec0b812992ab0dfb889744b94bc0994f0https://github.com/nextcloud/server/commit/a5471b4a3e3f30e99e4de39c97c0c3b3c2f1618fhttps://github.com/nextcloud/server/commit/e2c4f4f9aa11bc92e8f2212cce73841b922187e8https://hackerone.com/reports/153905https://nextcloud.com/security/advisory/?id=nc-sa-2016-007http://www.securityfocus.com/bid/97287