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TI-2021-18019 Aliases CVE-2021-41180

Geolocation preview links can be set to arbitrary links in nextcloud talk

Priority MEDIUM 60CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-601.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01042 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed security-advisories (nextcloud): 12.1.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nextcloudsecurity-advisoriesbefore 12.1.212.1.2Patch availableCNA
  • security-advisories Vendornextcloud Affected before 12.1.2 Fixed in 12.1.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:talk:*:*:*:*:*:android:*:*before 12.1.2Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:talk:*:*:*:*:*:android:*:* Versions before 12.1.2 Vulnerable ·nextcloud

Remediation

  • Fix · CNA security-advisories (nextcloud) Fixed in 12.1.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-41180

References

Exploit 1

Patch 1

Advisory 1

  • TI-2022-08697 Open Redirect in Nextcloud Talk CVSS 3.1MEDIUM 6.1
  • TI-2023-24170 Password of talk conversations can be bruteforced in Nextcloud CVSS 3.1MEDIUM 4.3
  • TI-2022-08700 Exposure of Private Personal Information to an Unauthorized Actor in Nextcloud Talk CVSS 3.1MEDIUM 4.3
  • TI-2020-06598 Code injection in Nextcloud Talk CVSS 3.1CRITICAL 9.9
  • TI-2023-08722 Passcode bypass on Talk-Android app CVSS 3.1LOW 2.1
  • TI-2021-12357 Nextcloud Talk not properly disassociating users from chats after account deletion CVSS 3.1HIGH 8.1
See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences