CVE-2020-8227
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 25.8%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
- CVSS 3.1
- 6.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 25.77% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Affected
- nextcloud/desktop
- Source
- support@hackerone.com
EPSS 25.8% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://hackerone.com/reports/590319Exploit, Third Party Advisory
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-032Broken Link, Exploit, Vendor Advisory
- https://security.gentoo.org/glsa/202009-09Third Party Advisory
- https://hackerone.com/reports/590319Exploit, Third Party Advisory
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-032Broken Link, Exploit, Vendor Advisory
- https://security.gentoo.org/glsa/202009-09Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.