What’s Vulnerable › Vulnerabilities

CVE-2021-32676: Session Fixation in Nextcloud Talk

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-16 · updated 2026-06-17
• Weakness: CWE-384

Description

Nextcloud Talk is a fully on-premises audio/video and chat communication service. Password protected shared chats in Talk before version 9.0.10, 10.0.8 and 11.2.2 did not rotate the session cookie after a successful authentication event. It is recommended that the Nextcloud Talk App is upgraded to 9.0.10, 10.0.8 or 11.2.2. No workarounds for this vulnerability are known to exist.

Affected products

• Nextcloud Talk: before 9.0.10; from 10.0.0 before 10.0.8; from 11.2.0 before 11.2.2 — fixed in 10.0.8, 11.2.2, 9.0.10

How to fix

Upgrade to a fixed version: Nextcloud Talk 10.0.8, 11.2.2, 9.0.10. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p6h7-84v4-827r
• https://hackerone.com/reports/1181962
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p6h7-84v4-827r
• https://hackerone.com/reports/1181962

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