# CVE-2021-40714: Adobe Experience Manager Reflected Cross Site Scripting via accesskey parameter

> An attacker can execute arbitrary JavaScript in a victim's browser by tricking them into visiting a malicious URL in Adobe Experience Manager.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/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:** 27 Sep 2021
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-h6rf-r988-mxqw

## What is CVE-2021-40714?

CVE-2021-40714 is a medium-severity cross-site scripting vulnerability in Adobe Experience Manager, published on 27 Sep 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

Adobe Experience Manager version 6.5.9.0 (and earlier) is affected by a reflected Cross-Site Scripting (XSS) vulnerability via the accesskey parameter. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser

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

## Which versions are affected by CVE-2021-40714?

It affects 1 product.


Products: Adobe Experience Manager.

## How do I fix CVE-2021-40714?

No fix has been published for CVE-2021-40714 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-40714 being exploited?

There is no known exploitation of CVE-2021-40714 in the wild and no public exploit code.

## Other vulnerabilities in Adobe Experience Manager

- [CVE-2026-90532](https://insights.sbomify.com/CVE-2026-90532/): Adobe Experience Manager | Incorrect Authorization (CWE-863) (critical 10.0)
- [CVE-2026-105895](https://insights.sbomify.com/CVE-2026-105895/): Adobe Experience Manager | Improper Input Validation (CWE-20) (critical 9.9)
- [CVE-2026-19232](https://insights.sbomify.com/CVE-2026-19232/): Adobe Experience Manager | Incorrect Authorization (CWE-863) (critical 9.9)
- [CVE-2025-49533](https://insights.sbomify.com/CVE-2025-49533/): Adobe Experience Manager (MS) | Deserialization of Untrusted Data (CWE-502) (critical 9.8)
- [CVE-2021-40722](https://insights.sbomify.com/CVE-2021-40722/): AEM Forms Improper Restriction of XML External Entity Reference (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-40714 and fix it if it is affected.

What it is: CVE-2021-40714 is a medium-severity cross-site scripting vulnerability in Adobe Experience Manager, published on 27 Sep 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-2021-40714 in the wild and no public exploit code.

Affected product: Adobe Experience Manager. 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-2021-40714/ (Markdown: https://insights.sbomify.com/CVE-2021-40714/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-40714
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-40714
- OSV: https://osv.dev/vulnerability/CVE-2021-40714

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-40714/
Summaries are generated and may contain mistakes; the official description above is the record.