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

> An attacker can manipulate geolocation preview links in the Nextcloud Talk Android app to redirect users to arbitrary malicious sites.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Mar 2022
- **Updated:** 22 Apr 2025
- **Also known as:** GHSA-4fxr-mrw2-cq92

## What is CVE-2021-41180?

CVE-2021-41180 is a medium-severity vulnerability in nextcloud security-advisories, published on 8 Mar 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2021-41180?

It affects 1 product.


Products: Nextcloud Talk.

## How do I fix CVE-2021-41180?

No fix has been published for CVE-2021-41180 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-41180 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-41180 exists.

## Other vulnerabilities in nextcloud security-advisories

- [CVE-2020-8180](https://insights.sbomify.com/CVE-2020-8180/): Code injection in Nextcloud Talk (critical 9.9)
- [CVE-2021-32689](https://insights.sbomify.com/CVE-2021-32689/): Nextcloud Talk not properly disassociating users from chats after account deletion (high 8.1)
- [CVE-2023-39957](https://insights.sbomify.com/CVE-2023-39957/): Path traversal allows tricking the Talk Android app into writing files into it's root directory (high 7.2)
- [CVE-2021-32676](https://insights.sbomify.com/CVE-2021-32676/): Session Fixation in Nextcloud Talk (medium 6.5)
- [CVE-2021-39222](https://insights.sbomify.com/CVE-2021-39222/): XSS in Talk (medium 6.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-41180 and fix it if it is affected.

What it is: CVE-2021-41180 is a medium-severity vulnerability in nextcloud security-advisories, published on 8 Mar 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-41180 exists.

Affected product: nextcloud security-advisories. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-41180/ (Markdown: https://insights.sbomify.com/CVE-2021-41180/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-41180
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-41180
- OSV: https://osv.dev/vulnerability/CVE-2021-41180

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-41180/
Summaries are generated and may contain mistakes; the official description above is the record.