# CVE-2021-1525: Cisco Webex Meetings and Webex Meetings Server File Redirect Vulnerability

> An unauthenticated remote attacker can redirect users to malicious files via crafted URLs, facilitating phishing or spoofing attacks in Cisco Webex Meetings.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/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:** 4 Jun 2021
- **Updated:** 7 Nov 2024
- **Also known as:** GHSA-7q8v-785j-jc5w

## What is CVE-2021-1525?

CVE-2021-1525 is a medium-severity vulnerability in Cisco Webex Meetings Online, published on 4 Jun 2021. 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

A vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server could allow an unauthenticated, remote attacker to redirect users to a malicious file. This vulnerability is due to improper validation of URL paths in the application interface. An attacker could exploit this vulnerability by persuading a user to follow a specially crafted URL that is designed to cause Cisco Webex Meetings to include a remote file in the web UI. A successful exploit could allow the attacker to cause the application to offer a remote file to a user, which could allow the attacker to conduct further phishing or spoofing attacks.

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

## Which versions are affected by CVE-2021-1525?

It affects 2 products.


Products: Cisco Webex Meetings Online, Cisco Webex Meetings Server.

## How do I fix CVE-2021-1525?

No fix has been published for CVE-2021-1525 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-1525 being exploited?

There is no known exploitation of CVE-2021-1525 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Webex Meetings Online

- [CVE-2018-0287](https://insights.sbomify.com/CVE-2018-0287/): Code injection in Cisco WebEx Advanced Recording Format Player (high 8.8)
- [CVE-2019-1637](https://insights.sbomify.com/CVE-2019-1637/): Cisco Webex Network Recording Player Arbitrary Code Execution Vulnerabilities (high 7.8)
- [CVE-2019-1638](https://insights.sbomify.com/CVE-2019-1638/): Cisco Webex Network Recording Player Arbitrary Code Execution Vulnerabilities (high 7.8)
- [CVE-2019-1639](https://insights.sbomify.com/CVE-2019-1639/): Cisco Webex Network Recording Player Arbitrary Code Execution Vulnerabilities (high 7.8)
- [CVE-2019-1640](https://insights.sbomify.com/CVE-2019-1640/): Cisco Webex Network Recording Player Arbitrary Code Execution Vulnerabilities (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-1525 and fix it if it is affected.

What it is: CVE-2021-1525 is a medium-severity vulnerability in Cisco Webex Meetings Online, published on 4 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-1525 in the wild and no public exploit code.

Affected product: Cisco Webex Meetings Online. 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-2021-1525/ (Markdown: https://insights.sbomify.com/CVE-2021-1525/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-1525
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-1525
- OSV: https://osv.dev/vulnerability/CVE-2021-1525

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-1525/
Summaries are generated and may contain mistakes; the official description above is the record.