What’s Vulnerable › Vulnerabilities

CVE-2020-8279

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-11-19 · updated 2026-06-17
• Weakness: CWE-295

Description

Missing validation of server certificates for out-going connections in Nextcloud Social < 0.4.0 allowed a man-in-the-middle attack.

Affected products

• Nextcloud Social: before 0.4.0 — fixed in 0.4.0

How to fix

Upgrade to a fixed version: Nextcloud Social 0.4.0. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/915585
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-043
• https://hackerone.com/reports/915585
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-043

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