PT-2020-20035 · Nextcloud · Nextcloud Server

Alx_Il + 1 · Published 2020-10-05 · Updated 2022-01-01 · CVE-2020-8223

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions Nextcloud Server version 19.0.0

Description A logic error in the software caused a privilege escalation, allowing malicious users to reshare with higher permissions than they were assigned.

Recommendations For Nextcloud Server version 19.0.0, update to a version that fixes this issue to prevent malicious users from escalating their privileges.

Exploit

Fix

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

CVE-2020-8223

Affected Products

Nextcloud Server

References · 6

• 🔥 https://hackerone.com/reports/889243 · Exploit
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8223 · Security Note
• https://osv.dev/vulnerability/CVE-2020-8223 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7FX3O6SJE2S52I2HAA4DSTUIISP5BNA · Vendor Advisory
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-029 · Vendor Advisory