# CVE-2021-1397: Cisco Integrated Management Controller Open Redirect Vulnerability

> An unauthenticated attacker can redirect users to malicious sites via crafted links in Cisco IMC, facilitating phishing attacks.

- **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:** 6 May 2021
- **Updated:** 8 Nov 2024
- **Also known as:** GHSA-rwcp-hmqx-m9f3

## What is CVE-2021-1397?

CVE-2021-1397 is a medium-severity vulnerability in Cisco Unified Computing System (Standalone), published on 6 May 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 the web-based management interface of Cisco Integrated Management Controller (IMC) Software could allow an unauthenticated, remote attacker to redirect a user to a malicious web page. This vulnerability is due to improper input validation of the parameters in an HTTP request. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to redirect a user to a malicious website. This vulnerability is known as an open redirect attack, which is used in phishing attacks to get users to visit malicious sites without their knowledge.

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

## Which versions are affected by CVE-2021-1397?

It affects 25 products.


Products: Cisco C125 M5 Firmware, Cisco C220 M5 Firmware, Cisco C220 M6 Firmware, Cisco C225 M6 Firmware, Cisco C240 M5 Firmware, Cisco C240 M6 Firmware, Cisco C245 M6 Firmware, Cisco C480 M5 Firmware, Cisco C480 Ml M5 Firmware, Cisco Encs 5100 Firmware, Cisco Encs 5400 Firmware, Cisco Integrated Management Controller, Cisco Ucs-E1120d-M3 Firmware, Cisco Ucs-E140d Firmware, Cisco Ucs-E140dp Firmware, Cisco Ucs-E140s-M1 Firmware, Cisco Ucs-E140s-M2 Firmware, Cisco Ucs-E140s Firmware, Cisco Ucs-E160d Firmware, Cisco Ucs-E160dp-M1 Firmware and 5 more.

## How do I fix CVE-2021-1397?

No fix has been published for CVE-2021-1397 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-1397 being exploited?

There is no known exploitation of CVE-2021-1397 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-1397 and fix it if it is affected.

What it is: CVE-2021-1397 is a medium-severity vulnerability in Cisco Unified Computing System (Standalone), published on 6 May 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-2021-1397 in the wild and no public exploit code.

Affected product: Cisco Unified Computing System (Standalone). 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-2021-1397/ (Markdown: https://insights.sbomify.com/CVE-2021-1397/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-1397
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-1397
- OSV: https://osv.dev/vulnerability/CVE-2021-1397

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-1397/
Summaries are generated and may contain mistakes; the official description above is the record.