CVE-2020-9743 HTML injection in AEM's content editor component

Medium 5.3 Published 10 Sep 2020 Updated 16 Sep 2024

Unauthenticated attackers can inject HTML into AEM content editor, enabling phishing attacks against victims.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-9743?

CVE-2020-9743 is a medium-severity cross-site scripting vulnerability in Adobe Experience Manager, published on 10 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

AEM versions 6.5.5.0 (and below), 6.4.8.1 (and below), 6.3.3.8 (and below) and 6.2 SP1-CFP20 (and below) are affected by an HTML injection vulnerability in the content editor component that allows unauthenticated users to craft an HTTP request that includes arbitrary HTML code in a parameter value. An attacker could then use the malicious GET request to lure victims to perform unsafe actions in the page (ex. phishing).

Weakness: CWE-79, CWE-20

Which versions are affected by CVE-2020-9743?

It affects 1 product.

Products include Adobe Experience Manager.

How do I fix CVE-2020-9743?

No fix has been published for CVE-2020-9743 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-2020-9743 being exploited?

There is no known exploitation of CVE-2020-9743 in the wild and no public exploit code.

All Adobe Experience Manager vulnerabilities

Sources

Also known as GHSA-h5m3-8vhj-cgjg.