Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2020-8150

A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 4.1, requiring local system access to exploit but requires specific conditions to be met without requiring user interaction . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 1 product from nextcloud organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-11-09T15:15:13.443

Last Modified

2024-11-21T05:38:23.413

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 4.1 (MEDIUM)

CVSSv2 Vector

AV:L/AC:M/Au:N/C:N/I:P/A:N

Access Vector: LOCAL
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

3.4

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-310
Type: Primary
CWE-311

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	nextcloud	nextcloud_server	< 19.0.2	Yes

References

http://seclists.org/fulldisclosure/2020/Dec/55 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2020/Dec/57 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2020/Dec/58 Mailing List, Third Party Advisory ([email protected])
https://hackerone.com/reports/742588 Exploit, Third Party Advisory ([email protected])
https://nextcloud.com/security/advisory/?id=NC-SA-2020-039 Vendor Advisory ([email protected])
http://seclists.org/fulldisclosure/2020/Dec/55 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2020/Dec/57 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2020/Dec/58 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://hackerone.com/reports/742588 Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://nextcloud.com/security/advisory/?id=NC-SA-2020-039 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For nextcloud's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.