CVE-2020-9742 Reflected XSS in AEM Inbox module

Critical 9.0 Published 10 Sep 2020 Updated 17 Sep 2024

Attackers with Author privileges can inject malicious scripts into the Inbox calendar, leading to code execution in victims' 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-2020-9742?

CVE-2020-9742 is a critical cross-site scripting vulnerability in Adobe Experience Manager, published on 10 Sep 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

AEM versions 6.5.5.0 (and below), 6.4.8.1 (and below) and 6.3.3.8 (and below) are affected by a stored XSS vulnerability that allows users with 'Author' privileges to store malicious scripts in fields associated with the Inbox calendar feature. These scripts may be executed in a victim’s browser when they open the page containing the vulnerable field.

Weakness: CWE-79

Which versions are affected by CVE-2020-9742?

It affects 1 product.

Products include Adobe Experience Manager.

How do I fix CVE-2020-9742?

No fix has been published for CVE-2020-9742 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-2020-9742 being exploited?

There is no known exploitation of CVE-2020-9742 in the wild and no public exploit code.

All Adobe Experience Manager vulnerabilities

Sources

Also known as GHSA-vmx3-v345-ffj8.