CVE-2021-40711 Adobe Experience Manager Stored Cross-Site Scripting Could Lead to Arbitrary Code Execution

Medium 5.4 Published 27 Sep 2021 Updated 23 Apr 2025

Authenticated attackers can inject malicious scripts via Content Fragments, leading to arbitrary code execution in victim browsers.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-40711?

CVE-2021-40711 is a medium-severity cross-site scripting vulnerability in Adobe Experience Manager, published on 27 Sep 2021. Any signed-in user can exploit it over the network, 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 stored XSS vulnerability when creating Content Fragments. An authenticated attacker can send a malformed POST request to achieve arbitrary code execution. Malicious JavaScript may be executed in a victim’s browser when they browse to the page containing the vulnerable field.

Weakness: CWE-79

Which versions are affected by CVE-2021-40711?

It affects 1 product.

Products include Adobe Experience Manager.

How do I fix CVE-2021-40711?

No fix has been published for CVE-2021-40711 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-40711 being exploited?

There is no known exploitation of CVE-2021-40711 in the wild and no public exploit code.

All Adobe Experience Manager vulnerabilities

Sources

Also known as GHSA-xh8q-wvvw-q9w3.