What’s Vulnerable › Vulnerabilities

CVE-2021-41180: Geolocation preview links can be set to arbitrary links in nextcloud talk

• Severity: medium (CVSS 6.1 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: yes
• Published: 2022-03-08 · updated 2026-06-17
• Weakness: CWE-601

Description

Nextcloud talk is a self hosting messaging service. In versions prior 12.1.2 an attacker is able to control the link of a geolocation preview in the Nextcloud Talk application due to a lack of validation on the link. This could result in an open-redirect, but required user interaction. This only affected users of the Android Talk client. It is recommended that the Nextcloud Talk App is upgraded to 12.1.2. There are no known workarounds.

Affected products

• Nextcloud Talk: before 12.1.2 — fixed in 12.1.2

How to fix

Upgrade to a fixed version: Nextcloud Talk 12.1.2. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4fxr-mrw2-cq92
• https://github.com/nextcloud/spreed/pull/6239
• https://hackerone.com/reports/1337178
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4fxr-mrw2-cq92
• https://github.com/nextcloud/spreed/pull/6239
• https://hackerone.com/reports/1337178

Get alerted when CVE-2021-41180 or the next vulnerability affects your stack