# CVE-2021-1154: Cross-site scripting in Cisco Small Business RV Series Router Firmware

> Authenticated attackers can inject scripts into the router management interface, potentially executing code or stealing browser data.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 Jan 2021
- **Updated:** 12 Nov 2024
- **Also known as:** GHSA-v7m7-f4jx-vjc4

## What is CVE-2021-1154?

CVE-2021-1154 is a medium-severity cross-site scripting vulnerability in Cisco Application Extension Platform, published on 13 Jan 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an authenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the interface. The vulnerabilities are due to insufficient input validation by the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-1154?

It affects 5 products.


Products: Cisco Application Extension Platform, Cisco Rv110w Firmware, Cisco Rv130 Vpn Router Firmware, Cisco Rv130w Firmware, Cisco Rv215w Wireless-N Vpn Router Firmware.

## How do I fix CVE-2021-1154?

No fix has been published for CVE-2021-1154 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-1154 being exploited?

There is no known exploitation of CVE-2021-1154 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Application Extension Platform

- [CVE-2021-34730](https://insights.sbomify.com/CVE-2021-34730/): Memory corruption in Cisco Small Business RV Series Router Firmware (critical 9.8)
- [CVE-2021-1146](https://insights.sbomify.com/CVE-2021-1146/): Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Command Injection Vulnerabilities (high 7.2)
- [CVE-2021-1147](https://insights.sbomify.com/CVE-2021-1147/): Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Command Injection Vulnerabilities (high 7.2)
- [CVE-2021-1148](https://insights.sbomify.com/CVE-2021-1148/): Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Command Injection Vulnerabilities (high 7.2)
- [CVE-2021-1149](https://insights.sbomify.com/CVE-2021-1149/): Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Command Injection Vulnerabilities (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-1154 and fix it if it is affected.

What it is: CVE-2021-1154 is a medium-severity cross-site scripting vulnerability in Cisco Application Extension Platform, published on 13 Jan 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-1154 in the wild and no public exploit code.

Affected product: Cisco Application Extension Platform. 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-2021-1154/ (Markdown: https://insights.sbomify.com/CVE-2021-1154/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-1154
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-1154
- OSV: https://osv.dev/vulnerability/CVE-2021-1154

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-1154/
Summaries are generated and may contain mistakes; the official description above is the record.